1. 2. All of these are examples of elements except — A. Cu B.KI C. He

1. 2. All of these are examples of elements except — A. Cu B.KI C. He D.H 3. What element in period 3 is a metalloid? 4.What is the appropriate subscript for oxygen in the models shown? A. 1 B.2 C.3 D.6 5. A chemical formula shows all of the following except — A. the number of atoms of each element B. the chemical symbols of elements C. the elements found in a compound D. the number of protons in a nucleus

1. 2. All of these are examples of elements except — A. Cu B.KI C. He D.H H 1 1 1 1 1 1 3. What element in period 3 is a metalloid? 4.What is the appropriate subscript for oxygen in the models shown? A. 1 B.2 C.3 D.6 5. A chemical formula shows all of the following except — A. the number of atoms of each element B. the chemical symbols of elements C. the elements found in a compound D. the number of protons in a nucleus

1. 2. All of these are examples of elements except — A. Cu B.KI C. He D.H H 1 1 1 1 1 1 He 2 4 2 2 2 2 2 3. What element in period 3 is a metalloid? 4.What is the appropriate subscript for oxygen in the models shown? A. 1 B.2 C.3 D.6 5. A chemical formula shows all of the following except — A. the number of atoms of each element B. the chemical symbols of elements C. the elements found in a compound D. the number of protons in a nucleus

1. 2. All of these are examples of elements except — A. Cu B.KI C. He D.H H 1 1 1 1 1 1 He 2 4 2 2 2 1 2 O 8 16 8 8 8 2 6 6 3. What element in period 3 is a metalloid? 4.What is the appropriate subscript for oxygen in the models shown? A. 1 B.2 C.3 D.6 5. A chemical formula shows all of the following except — A. the number of atoms of each element B. the chemical symbols of elements C. the elements found in a compound D. the number of protons in a nucleus

1. 2. All of these are examples of elements except — A. Cu B.KI C. He D.H H 1 1 1 1 1 1 He 2 4 2 2 2 1 2 O 8 16 8 8 8 2 6 6 3. What element in period 3 is a metalloid? Si – Silicone (Used In Computer Chips) 4.What is the appropriate subscript for oxygen in the models shown? A. 1 B.2 C.3 D.6 5. A chemical formula shows all of the following except — A. the number of atoms of each element B. the chemical symbols of elements C. the elements found in a compound D. the number of protons in a nucleus

2. All of these are examples of elements except — A. Cu B.KI C. He D.H
1. 2. All of these are examples of elements except — A. Cu B.KI C. He D.H H 1 1 1 1 1 1 c He 2 4 2 2 2 1 2 O 8 16 8 8 8 2 6 6 3. What element in period 3 is a metalloid? Si – Silicone (Used In Computer Chips) 4.What is the appropriate subscript for oxygen in the models shown? A. 1 B.2 C.3 D.6 5. A chemical formula shows all of the following except — A. the number of atoms of each element B. the chemical symbols of elements C. the elements found in a compound D. the number of protons in a nucleus c

6. An atom has 7 protons, 7 electrons, and 8 neutrons.
What is the atomic number, atomic mass, and charge: Atomic Number = Atomic Mass = Charge = This atom belongs to which element? 7. How many protons are in atom B? __ atom A? __ 8.How many neutrons are in atom B? __ atom A? __ 9. How many electrons are in atom A? __ atom B? __ 10. What is the atomic weight of atom B? __ atom A? __

What is the atomic number, atomic mass, and charge: Atomic Number = 7 Atomic Mass = Charge = This atom belongs to which element? 7. How many protons are in atom B? __ atom A? __ 8.How many neutrons are in atom B? __ atom A? __ 9. How many electrons are in atom A? __ atom B? __ 10. What is the atomic weight of atom B? __ atom A? __

What is the atomic number, atomic mass, and charge: Atomic Number = 7 Atomic Mass = 15 Charge = This atom belongs to which element? 7. How many protons are in atom B? __ atom A? __ 8.How many neutrons are in atom B? __ atom A? __ 9. How many electrons are in atom A? __ atom B? __ 10. What is the atomic weight of atom B? __ atom A? __

What is the atomic number, atomic mass, and charge: Atomic Number = 7 Atomic Mass = 15 Charge = 7 Positive Protons -7 Negative Electron = 0 or Nuetral This atom belongs to which element? 7. How many protons are in atom B? __ atom A? __ 8. How many neutrons are in atom B? __ atom A? __ 9. How many electrons are in atom A? __ atom B? __ 10.What is the atomic weight of atom B? __ atom A? __

What is the atomic number, atomic mass, and charge: Atomic Number = 7 Atomic Mass = 15 Charge = 7 Positive Protons + 7 Negative Electron = 0 or Nuetral This atom belongs to which element? N or Nitrogen (Organic Element) 7. How many protons are in atom B? __ atom A? __ 8. How many neutrons are in atom B? __ atom A? __ 9. How many electrons are in atom A? __ atom B? __ 10.What is the atomic weight of atom B? __ atom A? __

What is the atomic number, atomic mass, and charge: Atomic Number = 7 Atomic Mass = 15 Charge = 7 Positive Protons + 7 Negative Electron = 0 or Nuetral This atom belongs to which element? N or Nitrogen (Organic Element) 7. How many protons are in atom B? _8_ atom A? __ 8. How many neutrons are in atom B? __ atom A? __ 9. How many electrons are in atom A? __ atom B? __ 10.What is the atomic weight of atom B? __ atom A? __

What is the atomic number, atomic mass, and charge: Atomic Number = 7 Atomic Mass = 15 Charge = 7 Positive Protons + 7 Negative Electron = 0 or Nuetral This atom belongs to which element? N or Nitrogen (Organic Element) 7. How many protons are in atom B? _8_ atom A? __ 8. How many neutrons are in atom B? _8_ atom A? __ 9. How many electrons are in atom A? __ atom B? __ 10.What is the atomic weight of atom B? __ atom A? __

What is the atomic number, atomic mass, and charge: Atomic Number = 7 Atomic Mass = 15 Charge = 7 Positive Protons + 7 Negative Electron = 0 or Nuetral This atom belongs to which element? N or Nitrogen (Organic Element) 7. How many protons are in atom B? _8_ atom A? _1_ 8. How many neutrons are in atom B? _8_ atom A? _0_ 9. How many electrons are in atom A? _1_ atom B? _8_ 10.What is the atomic weight of atom B? __ atom A? __

What is the atomic number, atomic mass, and charge: Atomic Number = 7 Atomic Mass = 15 Charge = 7 Positive Protons + 7 Negative Electron = 0 or Nuetral This atom belongs to which element? N or Nitrogen (Organic Element) 7. How many protons are in atom B? _8_ atom A? _1_ 8. How many neutrons are in atom B? _8_ atom A? 9. How many electrons are in atom A? _1_ atom B? 10.What is the atomic weight of atom B? _16_ atom A?

11. How many valence electrons are on this atom?

11. How many valence electrons are on this atom? 4

12.Name and explain the role of this particle.

12.Name and explain the role of this particle. Valence electron determine the reactivity of the element

12.Name and explain the role of this particle. Valence electron determine the reactivity of the element 13. Name this element?

12.Name and explain the role of this particle. Valence electron determine the reactivity of the element 13. Name this element? Silicon

12.Name and explain the role of this particle. Valence electron determine the reactivity of the element 13. Name this element? Silicon 14.How many energy levels are there?

12.Name and explain the role of this particle. Valence electron determine the reactivity of the element 13. Name this element? Silicon 14.How many energy levels are there? 3

12.Name and explain the role of this particle. Valence electron determine the reactivity of the element 15. What makes up the mass? 13. Name this element? Silicon 14.How many energy levels are there? 3

12.Name and explain the role of this particle. Valence electron determine the reactivity of the element 15. What makes up the mass? Neutrons and Protons 13. Name this element? Silicon 14.How many energy levels are there? 3

16.Name the center of this atom.
11. How many valence electrons are on this atom? 12.Name and explain the role of this particle. Valence electron determine the reactivity of the element 15. What makes up the mass? Neutrons and Protons 13. Name this element? Silicon 16.Name the center of this atom. 14.How many energy levels are there? 3

16.Name the center of this atom. Nucleus
11. How many valence electrons are on this atom? 12.Name and explain the role of this particle. Valence electron determine the reactivity of the element 15. What makes up the mass? Neutrons and Protons 13. Name this element? Silicon 16.Name the center of this atom. Nucleus 14.How many energy levels are there? 3

boron_____________________ gold _______________________
15. Classify each of the following elements as an alkali metal, an alkaline-earth metal, metal, metalloid, halogen, or noble gas based on its position in the periodic table: boron_____________________ gold _______________________ krypton ___________________ calcium ________________ 19.What type of charge does a proton have? 20. What type of charge does a neutron have? 21. What type of charge does an electron Have? 22. Which two subatomic particles are located in the nucleus of an atom? 23. Calculate the atomic number of sodium which has 11 Protons & 12 Nuetrons 23b. Vocabulary Match the letter to the correct definitions. _____ 16. atom _____ 17. proton _____ 18. neutron A. a positively charged atomic particle B. an uncharged atomic particle C. the smallest particle of an element that has the chemical properties of that element

boron___Metalloid___________________ gold _______________________
15. Classify each of the following elements as an alkali metal, an alkaline-earth metal, metal, metalloid, halogen, or noble gas based on its position in the periodic table: boron___Metalloid___________________ gold _______________________ krypton ___________________ calcium ________________ 19.What type of charge does a proton have? 20. What type of charge does a neutron have? 21. What type of charge does an electron Have? 22. Which two subatomic particles are located in the nucleus of an atom? 23. Calculate the atomic number of sodium which has 11 Protons & 12 Nuetrons 23b. Vocabulary Match the letter to the correct definitions. _____ 16. atom _____ 17. proton _____ 18. neutron A. a positively charged atomic particle B. an uncharged atomic particle C. the smallest particle of an element that has the chemical properties of that element

boron___Metalloid___________________
15. Classify each of the following elements as an alkali metal, an alkaline-earth metal, metal, metalloid, halogen, or noble gas based on its position in the periodic table: boron___Metalloid___________________ gold ___Metal_____________________ krypton ___________________ calcium ________________ 19.What type of charge does a proton have? 20. What type of charge does a neutron have? 21. What type of charge does an electron Have? 22. Which two subatomic particles are located in the nucleus of an atom? 23. Calculate the atomic number of sodium which has 11 Protons & 12 Nuetrons 23b. Vocabulary Match the letter to the correct definitions. _____ 16. atom _____ 17. proton _____ 18. neutron A. a positively charged atomic particle B. an uncharged atomic particle C. the smallest particle of an element that has the chemical properties of that element

boron___Metalloid___________________
15. Classify each of the following elements as an alkali metal, an alkaline-earth metal, metal, metalloid, halogen, or noble gas based on its position in the periodic table: boron___Metalloid___________________ gold ___Metal_____________________ krypton _Noble Gas__________________ calcium ________________ 19.What type of charge does a proton have? 20. What type of charge does a neutron have? 21. What type of charge does an electron Have? 22. Which two subatomic particles are located in the nucleus of an atom? 23. Calculate the atomic number of sodium which has 11 Protons & 12 Nuetrons 23b. Vocabulary Match the letter to the correct definitions. _____ 16. atom _____ 17. proton _____ 18. neutron A. a positively charged atomic particle B. an uncharged atomic particle C. the smallest particle of an element that has the chemical properties of that element

boron___Metalloid___________________
15. Classify each of the following elements as an alkali metal, an alkaline-earth metal, metal, metalloid, halogen, or noble gas based on its position in the periodic table: boron___Metalloid___________________ gold ___Metal_____________________ krypton ___________________ calcium ________________ 19.What type of charge does a proton have? 20. What type of charge does a neutron have? 21. What type of charge does an electron Have? 22. Which two subatomic particles are located in the nucleus of an atom? 23. Calculate the atomic number of sodium which has 11 Protons & 12 Nuetrons 23b. Vocabulary Match the letter to the correct definitions. _____ 16. atom _____ 17. proton _____ 18. neutron A. a positively charged atomic particle B. an uncharged atomic particle C. the smallest particle of an element that has the chemical properties of that element

boron___Metalloid___________________
15. Classify each of the following elements as an alkali metal, an alkaline-earth metal, metal, metalloid, halogen, or noble gas based on its position in the periodic table: boron___Metalloid___________________ gold ___Metal_____________________ krypton _Noble Gas__________________ calcium ________________ 19.What type of charge does a proton have? 20. What type of charge does a neutron have? 21. What type of charge does an electron Have? 22. Which two subatomic particles are located in the nucleus of an atom? 23. Calculate the atomic number of sodium which has 11 Protons & 12 Nuetrons 23b. Vocabulary Match the letter to the correct definitions. _____ 16. atom _____ 17. proton _____ 18. neutron A. a positively charged atomic particle B. an uncharged atomic particle C. the smallest particle of an element that has the chemical properties of that element

boron___Metalloid___________________
15. Classify each of the following elements as an alkali metal, an alkaline-earth metal, metal, metalloid, halogen, or noble gas based on its position in the periodic table: boron___Metalloid___________________ gold ___Metal_____________________ krypton _Noble Gas__________________ calcium _Alkaline Metal_______________ 19.What type of charge does a proton have? 20. What type of charge does a neutron have? 21. What type of charge does an electron Have? 22. Which two subatomic particles are located in the nucleus of an atom? 23. Calculate the atomic number of sodium which has 11 Protons & 12 Nuetrons 23b. Vocabulary Match the letter to the correct definitions. _____ 16. atom _____ 17. proton _____ 18. neutron A. a positively charged atomic particle B. an uncharged atomic particle C. the smallest particle of an element that has the chemical properties of that element

boron___Metalloid___________________
15. Classify each of the following elements as an alkali metal, an alkaline-earth metal, metal, metalloid, halogen, or noble gas based on its position in the periodic table: boron___Metalloid___________________ gold ___Metal_____________________ krypton _Noble Gas__________________ calcium _Alkaline Metal_______________ 19.What type of charge does a proton have? 20. What type of charge does a neutron have? 21. What type of charge does an electron Have? 22. Which two subatomic particles are located in the nucleus of an atom? 23. Calculate the atomic number of sodium which has 11 Protons & 12 Nuetrons 23b. Vocabulary Match the letter to the correct definitions. __C___ 16. atom __A___ 17. proton __B___ 18. neutron A. a positively charged atomic particle B. an uncharged atomic particle C. the smallest particle of an element that has the chemical properties of that element

boron___Metalloid___________________
15. Classify each of the following elements as an alkali metal, an alkaline-earth metal, metal, metalloid, halogen, or noble gas based on its position in the periodic table: boron___Metalloid___________________ gold ___Metal_____________________ krypton _Noble Gas__________________ calcium _Alkaline Metal_______________ 19.What type of charge does a proton have? + 20. What type of charge does a neutron have? 21. What type of charge does an electron Have? 22. Which two subatomic particles are located in the nucleus of an atom? 23. Calculate the atomic number of sodium which has 11 Protons & 12 Nuetrons 23b. Vocabulary Match the letter to the correct definitions. __C___ 16. atom __A___ 17. proton __B___ 18. neutron A. a positively charged atomic particle B. an uncharged atomic particle C. the smallest particle of an element that has the chemical properties of that element

boron___Metalloid___________________
15. Classify each of the following elements as an alkali metal, an alkaline-earth metal, metal, metalloid, halogen, or noble gas based on its position in the periodic table: boron___Metalloid___________________ gold ___Metal_____________________ krypton _Noble Gas__________________ calcium _Alkaline Metal_______________ 19.What type of charge does a proton have? + 20. What type of charge does a neutron have? o 21. What type of charge does an electron Have? 22. Which two subatomic particles are located in the nucleus of an atom? 23. Calculate the atomic number of sodium which has 11 Protons & 12 Nuetrons 23b. Vocabulary Match the letter to the correct definitions. __C___ 16. atom __A___ 17. proton __B___ 18. neutron A. a positively charged atomic particle B. an uncharged atomic particle C. the smallest particle of an element that has the chemical properties of that element

boron___Metalloid___________________
15. Classify each of the following elements as an alkali metal, an alkaline-earth metal, metal, metalloid, halogen, or noble gas based on its position in the periodic table: boron___Metalloid___________________ gold ___Metal_____________________ krypton _Noble Gas__________________ calcium _Alkaline Metal_______________ 19.What type of charge does a proton have? + 20. What type of charge does a neutron have? o 21. What type of charge does an electron Have? - 22. Which two subatomic particles are located in the nucleus of an atom? 23. Calculate the atomic number of sodium which has 11 Protons & 12 Nuetrons 23b. Vocabulary Match the letter to the correct definitions. __C___ 16. atom __A___ 17. proton __B___ 18. neutron A. a positively charged atomic particle B. an uncharged atomic particle C. the smallest particle of an element that has the chemical properties of that element

boron___Metalloid___________________
15. Classify each of the following elements as an alkali metal, an alkaline-earth metal, metal, metalloid, halogen, or noble gas based on its position in the periodic table: boron___Metalloid___________________ gold ___Metal_____________________ krypton _Noble Gas__________________ calcium _Alkaline Metal_______________ 19.What type of charge does a proton have? + 20. What type of charge does a neutron have? o 21. What type of charge does an electron Have? - 22. Which two subatomic particles are located in the nucleus of an atom? Nuetrons and Protons 23. Calculate the atomic number of sodium which has 11 Protons & 12 Nuetrons 23b. Vocabulary Match the letter to the correct definitions. __C___ 16. atom __A___ 17. proton __B___ 18. neutron A. a positively charged atomic particle B. an uncharged atomic particle C. the smallest particle of an element that has the chemical properties of that element

boron___Metalloid___________________
15. Classify each of the following elements as an alkali metal, an alkaline-earth metal, metal, metalloid, halogen, or noble gas based on its position in the periodic table: boron___Metalloid___________________ gold ___Metal_____________________ krypton _Noble Gas__________________ calcium _Alkaline Metal_______________ 19.What type of charge does a proton have? + 20. What type of charge does a neutron have? o 21. What type of charge does an electron Have? - 22. Which two subatomic particles are located in the nucleus of an atom? Nuetrons and Protons 23. Calculate the atomic number of sodium which has 11 Protons & 12 Nuetrons 11 23b. Vocabulary Match the letter to the correct definitions. __C___ 16. atom __A___ 17. proton __B___ 18. neutron A. a positively charged atomic particle B. an uncharged atomic particle C. the smallest particle of an element that has the chemical properties of that element

24. Which element can be identified as having 16 protons?
A. Neon B .Oxygen C .Phosphorus D .Sulfur 26.Which of the following correctly sequences the structures from least to greatest in mass? A. atom, proton, electron B .electron, proton, atom C .proton, electron, atom D .atom, electron, proton 27. Which of the following statements best describes titanium? A. A titanium atom has 48 electrons in its energy levels. B. A titanium atom has 22 negative charges in its nucleus. C. A titanium atom has more subatomic particles than a calcium atom. D. A titanium atom has more subatomic particles 25. Which of the following could be the chemical formula for sulfuric acid? A. HSO B.HSO4 C.H2SO4 D.HS2O4 28. Which group on the Periodic Table most likely contains an element that is highly reactive, a good conductor of electricity, and malleable? A. Group 1 B. Group 7 C. Group 13 D. Group 18

29. 31. Name this group. How many valence electrons
Which groups are the most reactive? Name this group. Name this group. 31. Name this group.

Which groups are the most reactive?
29. Which groups are the most reactive? Name this group. Name this group. 31. Name this group.

Which groups are the most reactive?
29. Which groups are the most reactive? Name this group. 31. Name this group.

29. Name this group. 31. Name this group.

29. 31. Name this group.

29. 31.

CHEMISTRY: COUNTING ATOMS IN COMPOUNDS WORKSHEET #7.0.1
30. INSTRUCTIONS: Write the quantity of atoms of each element opposite the formula of the compound for the quantity of formula units and molecules shown: For example: 5P2O P = (5 x 2) O = (5 x3) 15 For example: 4Zn(NO3)2 Zn = (4 x 1 ) N = (4 x 1 x 2) O = (4 X 3 X 2 = ) 24 1. 4K2CO3K K = _____ C = ____ O = ____ 2. 2Sr3(PO4) Sr = ____ P = ____ O = ____ 3. 3N4O N = _____ O = ____ 4. 2(NH4)3N N = ____ H = ____ 5. 8Cl2O Cl = ____ O = ____

30. INSTRUCTIONS: Write the quantity of atoms of each element opposite the formula of the compound for the quantity of formula units and molecules shown: For example: 5P2O P = (5 x 2) O = (5 x3) 15 For example: 4Zn(NO3)2 Zn = (4 x 1 ) N = (4 x 1 x 2) O = (4 X 3 X 2 = ) 24 1. 4K2CO3K K = _(4x2) + 1 = 9____ C = _(4x1) = 4___ O = _(4x3) = 12___ 2. 2Sr3(PO4) Sr = ____ P = ____ O = ____ 3. 3N4O N = _____ O = ____ 4. 2(NH4)3N N = ____ H = ____ 5. 8Cl2O Cl = ____ O = ____

30. INSTRUCTIONS: Write the quantity of atoms of each element opposite the formula of the compound for the quantity of formula units and molecules shown: For example: 5P2O P = (5 x 2) O = (5 x3) 15 For example: 4Zn(NO3)2 Zn = (4 x 1 ) N = (4 x 1 x 2) O = (4 X 3 X 2 = ) 24 1. 4K2CO3K K = _(4x2) + 1 = 9____ C = _(4x1) = 4___ O = _(4x3) = 12___ 2. 2Sr3(PO4) Sr = _(2x3) = 6___ P = _(2x2) = 4___ O = _(2x4x2) = 16___ 3. 3N4O N = _____ O = ____ 4. 2(NH4)3N N = ____ H = ____ 5. 8Cl2O Cl = ____ O = ____

30. INSTRUCTIONS: Write the quantity of atoms of each element opposite the formula of the compound for the quantity of formula units and molecules shown: For example: 5P2O P = (5 x 2) O = (5 x3) 15 For example: 4Zn(NO3)2 Zn = (4 x 1 ) N = (4 x 1 x 2) O = (4 X 3 X 2 = ) 24 1. 4K2CO K = _(4x2) + 1 = 9____ C = _(4x1) = 4___ O = _(4x3) = 12___ 2. 2Sr3(PO4) Sr = _(2x3) = 6___ P = _(2x2) = 4___ O = _(2x4x2) = 16___ 3. 3N4O N = _(3x4) =12____ O = _(3x10) = 30___ 4. 2(NH4)3N N = ____ H = ____ 5. 8Cl2O Cl = ____ O = ____

30. INSTRUCTIONS: Write the quantity of atoms of each element opposite the formula of the compound for the quantity of formula units and molecules shown: For example: 5P2O P = (5 x 2) O = (5 x3) 15 For example: 4Zn(NO3)2 Zn = (4 x 1 ) N = (4 x 1 x 2) O = (4 X 3 X 2 = ) 24 1. 4K2CO K = _(4x2) + 1 = 9____ C = _(4x1) = 4___ O = _(4x3) = 12___ 2. 2Sr3(PO4) Sr = _(2x3) = 6___ P = _(2x2) = 4___ O = _(2x4x2) = 16___ 3. 3N4O N = _(3x4) =12____ O = _(3x10) = 30___ 4. 2(NH4)3N N = _(2x3)+1= 7___ H = _(2x4x3) = 24___ 5. 8Cl2O Cl = ____ O = ____

30. INSTRUCTIONS: Write the quantity of atoms of each element opposite the formula of the compound for the quantity of formula units and molecules shown: For example: 5P2O P = (5 x 2) O = (5 x3) 15 For example: 4Zn(NO3)2 Zn = (4 x 1 ) N = (4 x 1 x 2) O = (4 X 3 X 2 = ) 24 1. 4K2CO K = _(4x2) + 1 = 9____ C = _(4x1) = 4___ O = _(4x3) = 12___ 2. 2Sr3(PO4) Sr = _(2x3) = 6___ P = _(2x2) = 4___ O = _(2x4x2) = 16___ 3. 3N4O N = _(3x4) =12____ O = _(3x10) = 30___ 4. 2(NH4)3N N = _(2x3)+1= 7___ H = _(2x4x3) = 24___ 5. 8Cl2O Cl = _(8x2) =16___ O = _(8x1) = 8___

31. Physical or Chemical Change
31. Physical or Chemical Change? Indicate with a ‘P’ or a ‘C’ which type of change is taking place. 1. ____ glass breaking ____mixing salt and water 2. ____ hammering wood together ____mixing oil and water 3. ____a rusting bicycle ___water evaporating 4. ____melting butter ____cutting grass 5. ____separate sand from gravel ___burning leaves 6. ____bleaching your hair ___ fireworks exploding 7. ____ frying an egg ___cutting your hair 8. ____squeeze oranges for juice ___ crushing a can 9. ____melting ice ____boiling water

31. Physical or Chemical Change
31. Physical or Chemical Change? Indicate with a ‘P’ or a ‘C’ which type of change is taking place. 1. __P__ glass breaking __P__mixing salt and water 2. __P__ hammering wood together __P__mixing oil and water 3. __C__a rusting bicycle __P__water evaporating 4. __P__melting butter __P__cutting grass 5. __P__separate sand from gravel __C__burning leaves 6. __C__bleaching your hair __C__ fireworks exploding 7. __C__ frying an egg __P__cutting your hair 8. __P__squeeze oranges for juice __P__ crushing a can 9. __P__melting ice __P__boiling water

many electrons does this atom have? A. 4 B. 8 C. 9 D. 15
32. Which of the following atoms would have a charge of +1? A. An atom with 9 protons, 9 electrons, and 9 neutrons B. An atom with 7 protons, 11 electrons, and 8 neutrons C. An atom with 5 protons, 5 electrons, and 4 neutrons D. An atom with 6 protons, 5 electrons, and 7 neutrons 33. The nucleus of the atom contains 8 protons and 9 neutrons. The atom is electrically neutral. How many electrons does this atom have? A. 4 B. 8 C. 9 D. 15 34. If an atom has 17 protons, 18 neutrons, and 17 electrons, what is the mass of this atom? A. 17 B. 18 C. 35 D. 52 35. The charge of an atom is determined by the - A. shape of the electron cloud. B. atomic mass of the element. C. radius of the outermost electron. D. number of protons and electrons. 36. Which of the following lists the two subatomic particles that contribute the most to the mass of an atom? A. Protons and electrons B. Protons and neutrons C. Neutrons and electrons D. Electrons and ions .

39. 40. P + O2 P4O10 Mg + O2 MgO HgO Hg + O2 Al2O3 Al + O2
Part A: Identify the following parts of each chemical formula by circling the subscripts and drawing a square around the coefficients. H2 2 HCl 4 O2 CH4 3 CO3 2 NaOH 1. 2. 3. 4. Part B: Balance each of the following equations following the procedure described in class. Be sure to show your work. During the process of digestion food is taken into the mouth and several processes occur. The teeth and tongue act to grind and break up food into smaller particles. At the same time salivary amylase helps to begin the breakdown of complex carbohydrates into much smaller sugars. Which of the following is most true regarding these processes? A. Both processes involve physical changes B. Both processes involve chemical changes C. Chewing is a chemical process while the action of amylase is physical D. Chewing is a physical process while the action of amylase is chemical P + O2 P4O Mg + O2 MgO P = P = Mg = Mg = O = O = O = O = HgO Hg + O Al2O Al + O2 Hg = Hg = Al = Al = O = O = O = O = 39. 40.

Chemical Formulas Must be Balanced
APE MAN A=P=E M-A=N A= Atomic Number P=Proton E=Electron M= Mass A=Atomic Number N=Nuetron Chemical Formulas Must be Balanced 41.

1. 2. All of these are examples of elements except — A. Cu B.KI C. He

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1. 2. All of these are examples of elements except — A. Cu B.KI C. He

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Presentation on theme: "1. 2. All of these are examples of elements except — A. Cu B.KI C. He"— Presentation transcript:

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