Apologia Chemistry Module 2 Review

ElementsCompounds Atoms Molecules

100

Things that can be found on the periodic table 

an element 

200

Basic unit of a chemical element 

an atom

300

Groups of two or more atoms help together by chemical bonds.  

EX:H₂0, O₂, NaCl

Molecule 

400

These are examples of: 

H₂0

CO₂

CH₄

Molecules OR compounds 

500

What is ozone? O₃

molecule

Metal or Non-metal

100

How can you experimentally tell if something is ionic or covalent? 

What would be ionic? What would be covalent? 

If it conducts electricity it is ionic and has a metal in it. 

If it doesn't conduct electricity, it's covalent - no metals. 

200

How can you tell from the periodic table if something is a metal or non-metal?

Metals are below the stairs. Non- metals, above the stairs plus H. 

300

Ionic or Covalent? and name 

SiF₄

covalent

Sulfur tetrafluoride 

400

Ionic or covalent and name? 

CaBr₂

Ionic 

calcium bromide 

500

Ionic or covalent and name 

RbCl

ionic 

Rubidium chloride 

What's my name?

100

CO

Carbon monoxide 

200

CaO

calcium oxide 

300

Al₂S₃

Aluminium trisulfide 

400

H₂0

dihydrogen monoxide 

500

N₄H₆

tetranitrogen hexahydride

What am I?

100

Pure or Mixed? Element or compound? If mixed, heterogenous or homogenous?  

HN0₃

pure, compound 

200

Pure or Mixed? Element or compound? If mixed, heterogenous or homogenous? 

Sb (antimony)

pure, element 

300

Copper wire 

pure, element Cu

400

Pure or Mixed? Element or compound? If mixed, heterogenous or homogenous?  

fresh squeezed lemonade 

 heterogeneous mixture 

500

Pure or Mixed? Element or compound? If mixed, heterogenous or homogenous?  

C₆H₁₂O₆

compound 

Grab Bag ALL TEAMS DO 500 point question

100

Name this: 

diphosphorus hexaoxide 

P₂O₆

200

dinitrogen tetrahydride 

N₂H₄

300

Na₂S

Sodium Sulfide 

400

A chemist decomposes 150.0g of water (H₂0).  They find that 14.6 g of hydrogen is made, how much oxygen is produced? (use sig figs)

150.0g-14.6g = 135.4g of oxygen

(go with least precise) 

500

Show how the law of conservation of mass is proven when 28.4 grams of carbon react with 7.08 grams of hydrogen, natural gas that is burned in a gas stove is produced.  There is NO leftover carbon or hydrogen when these quantities are used.  How much of each would you need to make 246.0 g of natural gas? 

C = 197 g

H = 49.0 g 

1.Find total mass first:

28.4 g C + 7.08 g H = 35.08 total g of natural gas = SF = 35.5 g

2. Find ratio

246.0g/35.5g = 6.93 (dimensionless quantity) 

3.  Find new quantity based on 6.93 x bigger

28.4g x 6.93 = 196.8 g of C = SF = 197 g of C

7.08 g x 6.93 = 49.06g = SF = 49.0 g of H 

197+49.0 = 246.0g

***Conservation of mass means no matter was created nor destroyed.