1. Atomic Structure & Periodic Table review

2. Which of the following is the most accurate representation of an atom

3. Which of the following is the most accurate representation of an atom

4. Which of the following is the most accurate representation of an atom

5. Which of the following is the most accurate representation of an atom

6. Subatomic particles in an atom where located/charge/relative size
Charge of nucleus: +
Charge of electron cloud: -- - +

7. Subatomic particles in an atom where located/charge/relative size
e e N
P N P
N P

8. SPACE
MASS

9. Why do we use AMU (atomic mass units) when representing the mass of an atom instead of using grams or kilograms?

10. Atoms are very small, using grams would result in a number with a scientific notation of 10-27.
AMU is a unit used exclusively for atoms, it is much smaller than grams and therefore more useful

11. Reading Periodic Table Cells13 Al
Aluminum
26.98
Atomic Number
Number of protons =
Number of electrons
Atomic Mass Number
(this is an average of isotopes)
Mass # - Atomic # = neutron #
When calculating # of neutrons, you must round the
mass # to a whole number….you can’t have partial Neutrons!

12. An atom has an atomic number of:
11…..what can you infer 27…..what can you infer 87….what can you infer

13. An atom has an atomic number of:
11…..what can you infer it has 11 protons it has 11 electrons 27…..what can you infer it has 27 protons it has 27 electrons 87….what can you infer it has 87 protons it has 87 electrons

14. An ion has an atomic number of
5…..what can you infer it has 5 protons 32…what can you infer it has 32 protons 11…what can you infer it has 11 protons

15. Find the number of protons, neutrons and electrons for each of the following neutral atoms
Calcium Chlorine

16. Find the number of protons, neutrons and electrons for each of the following neutral atoms
Calcium 20 protons 20 electrons 20 neutrons Chlorine 17 protons 17 electrons 18 neutrons

17. Calculate the mass of the following elements
Element A has 12 protons, 13 neutrons & 12 electrons Element B has 9 protons, 7 neutrons & 9 electrons

18. Calculate the mass of the following elements
Element A has 12 protons, 13 neutrons & 12 electrons 12 protons + 13 neutrons = 25 mass Element B has 9 protons, 7 neutrons & 9 electrons 9 protons + 7 neutrons = 16 mass

19. Page 16 & 17 review
What are the 3 categories of elements on the periodic table? What are the properties of each? Where are they located on the periodic table?

20. Metals: left side of table
Shiny
conductive
malleable
Ductile
Metalloids: along the stair steps
Properties of metals and nonmetals
Semiconductors, used in computer industry
NonMetals: right side of table
Dull
Insulator
Do not conduct heat or electricity
brittle

21. Periodic Table Organization
Groups/families
Information in group:
group number = number of valence e-
group members have similar properties
Find four elements with similar properties
Find 2 elements with similar properties and 4 valence electrons

22. Periodic Table Organization
Groups/families
Information in group:
group number = number of valence e-
group members have similar properties
Find four elements with similar properties
Find 2 elements with similar properties and 4 valence electrons
carbon (C), silicon (Si), Germanium (Ge), Tin (Sn), Lead (Pb)

23. Periodic Table Organization
Period Information in period: period number = number of electron energy levels max # of electrons in each level (ring) period 1….2 e- period 2….8 e- period 3….8 e- Find 3 elements with 4 electron energy levels Find 3 elements with two energy levels

24. Describe these groups using the following terms: reactive, nonreactive, more stable, inert Alkali metal Halogen Noble Gas Alkaline Earth Metal Transition Metal

25. Group /family characteristics
Alkali metal…..reactive metals, group 1, +1 ion Alkaline earth metal…..reactive metals, group 2, +2 ion Transition metals/elements….less reactive metals, located at the center of the table, groups 3-12 Halogen…reactive nonmetals, used in cleaning agents, group 17, -1 ion Noble Gases….nonreactive nonmetals, group 18, very stable due to complete outer electron ring, do not form ions

26. Find examples of: Two different groups/families that are both reactive
Two different groups/families that are stable and reactive

27. What do Na, K and Rb have in common
What do Na, K and Rb have in common? What do Mg, P and Cl have in common?

28. Dull, brittle and non conductive best describes which of the following: Pd, S, Mg, Fe

29. Which of the following elements are very reactive: Au, Fe, Cl, Zn

30. How are groups 1, 2 and 17 different from transition metals (groups 3-12)?

31. Describe element properties as you move from left to right across period #.....

32. Describe element properties as you move from left to right across period #.....
1 reactive, nonreactive 2 reactive, less reactive, reactive, nonreactive 3 reactive, less reactive, reactive, nonreactive 4 reactive, somewhat stable, less reactive, reactive, nonreactive

33. Ions Formed by losing or gaining electrons
Metals give electrons
Nonmetals take electrons
An atom gives/takes electrons in order to create a complete outer ring of electrons (valence)…..this makes it stable, because its electron arrangement is like the noble gases (group 18).

34. An ion with a charge of +2 has
Lost 2 electrons
Gained 2 protons
Gained 2 electrons
Lost 2 neutrons

35. An ion with a charge of -3 has
Lost 3 protons
Lost 3 electrons
Gained 3 electrons
Gained 3 protons

36. Isotopes
Different forms of the SAME ELEMENT. Isotopes of an element have different numbers of neutrons therefore they will have a different mass.

37. Which of the following isotopes have 12 protons: Mg-12, C-6, F-12, Mg -19, C-12, F-18

38. How is S-24 different from S-20 it has 4 more protons it has 4 more electrons it has 4 more neutrons it has 2 more neutrons and 2 more protons

39. Doesn’t react with other elements, inert F E B C A
Doesn’t react with other elements, inert
Used in industry, found in pure form in nature, not very reactive
3 electron energy levels
Reactive with 2 valence electrons
1 valence electron and 5 energy levels
Reactive nonmetal with 4 energy levels

40. Doesn’t react with other elements, inert (D) F E B C A
Doesn’t react with other elements, inert (D)
Used in industry, found in pure form in nature, not very reactive (C)
3 electron energy levels (F)
Reactive with 2 valence electrons (A)
1 valence electron, metal and 5 energy levels (B)
Reactive nonmetal with 4 energy levels (E)