January 20/23 Topic of the Day: Review Quick Write: If a block of maple wood has a density value of 3. 5g/cm3 if we cut the block in half what will result in the density value of that piece of wood? If a sample of gas molecules are trapped in a balloon over a flask and are heated up, describe what will occur to the space and movement of those molecules. How can you identify that a chemical change has taken place within a sample of matter? Describe 4 steps to take in finding the volume of an irregular shaped object. Define the following: isotope and quark What is the Octet Rule? Homework: Study and review all note slides, What to study topics from September, midterm review slides, old tests and quizzes SWBAT: Midterm Review

If a block of maple wood has a density value of 3 If a block of maple wood has a density value of 3. 5g/cm3 if we cut the block in half what will result in the density value of that piece of wood? The density is the same because it is a ratio between mass and volume so it NEVER changes if cut in half or doubled in size! 2. If a sample of gas molecules are trapped in a balloon over a flask and are heated up, describe what will occur to the space and movement of those molecules. The molecules gain energy so move faster and move away from each other. 3. How can you identify that a chemical change has taken place within a sample of matter? The sample of matter will turn into a new substance and it cannot be turned back into its original form naturally.

4. Describe 4 steps to take in finding the volume of an irregular shaped object. 1. measure and record a sample of water in a graduated cylinder. 2. Place your irregular object slowly into the graduated cylinder. 3. Record the new volume. 4. Find the difference between the two recordings and that is the volume  5. Define the following: isotope and quark Isotope: atom that has the same number of protons but a different number of neutrons. Quark: particle that makes up all other known particle in the nucleus of an atom 6. What is the Octet Rule? All atoms want to have 8 valence electrons in their outer shell, except He!

Study for your Midterms! Midterm Practice BLOCK MASS VOLUME DENSITY A 40.7 g a) ______ 0.75g/ cm3 B b) _____ 87.4 cm3 0.50 g/ cm3 C 14.22 g 7.9 cm 3

Study for your Midterms! Quick Write Midterm Prep: Solve for the following conversions: 78.9 g = ____________mg 254 Kl = ______________L 21 inches =____________cm 0.08 Hm = _____________ dm   0.08 Hm = ___________Dm 0.42 cg = ______________g

Write Boyle’s Law in the box: With a fixed amount of gas, when the ___________ is increased, the volume __________. When the __________ is decreased, the volume __________. Example: Problem: A sample of nitrogen gas occupies a volume of 476.0 mL at 750 torr pressure. What volume will it occupy at 975 torr pressure? Answer ______ Given and Units Equation Substitute and Solve

CHARLES’ LAW Write Charles’ Law in the box: Charles’ Law: With a fixed amount of gas, when the ___________ is increased, the volume __________. When the __________ is decreased, the volume __________. Example Problem: A sample of helium gas occupies a volume of 330.0 mL at 15 °C. What volume will it occupy at 85°C? Answer _______________ Given and Units Equation Substitute and Solve K = °C + 273

Can you answer the following using your Colored Periodic Table? In Group 15 you can find which Family? _________________ In Group 18 you can find which Family? _________________ In Groups 3-12 contain which Family? __________________ Identify the two liquid elements found on the Periodic Table, write the symbol and the element name. ________________ ________________ Write the valence electron number at the top of each Family with the exception of the Transition Metals. Is Hg a metal, non metal or metalloid? ______________ List all of the Metalloids. ________________________________________ Is Hydrogen part of the Alkali Family? ___________ What is the valence electron number for He? ______ What Family is it a part of?_______________ Label the Families on the blank Periodic Table below.

Solve the following problems. Element Symbol Atomic # Mass # # of protons neutrons # of electrons Electron Energy Level Configuration 1. ____ 27 2._____ 34 Find the Valence Electron Xe P Po Sr Ga S He Si Name Valence # He P Mg As Ca Kr

Se He Ar For each Element complete the following: Identify the Atomic Number Write the electron energy level configuration Draw the Bohr Model Identify the valence electron number Draw the Lewis Dot Diagram Se He Ar

Identify the number of atoms within this molecule or compound Identify the number of atoms within this molecule or compound. 2Mg(NO3)2 NaNO2 3KHCO3

Vaporization - Condensation - Sublimation - Melting - Crystallization - Amorphous - John Dalton - JJ Thompson - E. Rutherford - N. Bohr - Ionization energy - Anions - Cations -

Electron affinity - Protons - Electrons - Neutrons - Quark - Atomic Number - Atomic Mass - Mass Number Isotopes Chemical Bonds - Charles Law - Boyle’s Law - Ions - Ionic Bonds - Covalent Bonds

Study for your Midterms! Midterm Practice BLOCK MASS VOLUME DENSITY A 40.7 g a) 54.3 cm3 0.75g/ cm3 B b) 43.7g 87.4 cm3 0.50 g/ cm3 C 14.22 g 7.9 cm 3 1.8 g/cm3

Study for your Midterms! Quick Write Midterm Prep: Solve for the following conversions: 78.9 g = 78900 mg 254 Kl = 254,000 L 21 inches 53.3 cm 0.08 Hm = 80.0 dm   0.08 Hm = 0.8 Dm 0.42 cg = 0.0042 g

V2 = 366.2 ml BOYLE’S LAW Write Boyle’s Law in the box: Boyles’ Law: With a fixed amount of gas, when the ___________ is increased, the volume __________. When the __________ is decreased, the volume __________. Example: Problem: A sample of nitrogen gas occupies a volume of 476.0 mL at 750 torr pressure. What volume will it occupy at 975 torr pressure? Answer ______ Given and Units Equation Substitute and Solve V2 = 366.2 ml

V2 = 410.2ml CHARLES’ LAW Write Charles’ Law in the box: Charles’ Law: With a fixed amount of gas, when the ___________ is increased, the volume __________. When the __________ is decreased, the volume __________. Example Problem: A sample of helium gas occupies a volume of 330.0 mL at 15 °C. What volume will it occupy at 85°C? Answer _______________ Given and Units Equation Substitute and Solve K = °C + 273 V2 = 410.2ml

Can you answer the following using your Colored Periodic Table? In Group 15 you can find which Family? nitrogen In Group 18 you can find which Family? Noble gas In Groups 3-12 contain which Family? Transition metals Identify the two liquid elements found on the Periodic Table, write the symbol and the element name. Br Hg Write the valence electron number at the top of each Family with the exception of the Transition Metals. Is Hg a metal, non metal or metalloid? metal List all of the Metalloids. B, Si, Ge, As, Sb, Te, Po, At Is Hydrogen part of the Alkali Family? halogen What is the valence electron number for He? 2 What Family is it a part of? Noble Gases Label the Families on the blank Periodic Table below.

NOBLE GASES ALKALI CARBON ALKALINE EARTH BORON NITROGEN OXYGEN HALOGEN TRANSITION LANTHINOID ACTINOID

Solve the following problems. Element Symbol Atomic # Mass # # of protons neutrons # of electrons Electron Energy Level Configuration Co 1. ____ 27 59 32 2-8-17 2._Se____ 34 79 45 2-8-18-6 Find the Valence Electron Xe P Po Sr Ga S He Si Name Valence # 8 5 6 2 3 4 He P Mg As Ca Kr

Se He Ar For each Element complete the following: Identify the Atomic Number Write the electron energy level configuration Draw the Bohr Model Identify the valence electron number Draw the Lewis Dot Diagram Se He Ar

Identify the number of atoms within this molecule or compound Identify the number of atoms within this molecule or compound. 2Mg(NO3)2 NaNO2 3KHCO3 Mg 2 Na 1 K 3 N 4 N 1 H 3 O 12 O 2 C 3 O 9

The end of the study guide.