Chemistry Review for Test # 1
Name: ____________________________________________
Science ___
ATOMIC PARTICLES/ STRUCTURE
1. Electrons have a _________ charge and are found here in atoms: ______________________________________
2. ________ How many hydrogen atoms are in: 6C2H4?
3. ________ How many molecules are represented by this? : 6C2H4?
4. CH3 CH2 CH2 OH has ________ elements in it.
5. All carbon atoms must have the same number of:
protons
neutrons
electrons
6. Hydrogen and ___________________________ are exceptions to the Octet Rule.
7. Draw these molecules: Please show all valence electrons. Be neat!
Carbon Dioxide: CO2
Water: H2O
Nitrogen gas: N2
8. Determine what each atom is based on the # of bonds made and write the formula for each molecule below.
Choose from the following atoms: Carbon, Hydrogen, Oxygen and Nitrogen.
Formula: __________
Formula: _________
REACTIONS
9. Balance the following equation where propane is combusted with oxygen:
C3H8 + ______O2  3CO2 + ______H2O
10. Balance this equation:
_____ Al
+
______ CuCl2 
_____AlCl3 + _____ Cu
11. Write the formula for the missing compound below.
NaOH + HCl  H2O + ___________________
Chemistry Review for Test # 1
12. What gas is absolutely necessary for burning wood? _____________________________
13. What 2 products are produced any time something like wood, paper or gasoline is burned?
14. Write the balanced chemical equation for the combustion of methane gas:
CH4
+
15. Write a balanced chemical equation for the combustion of hydrogen gas:
_____ H2
+
16. Write the balanced chemical equation for water decomposing to oxygen gas and hydrogen gas:
17. Name an element that will not react with other chemicals. ____________________
18. Name 2 pure substances:____________________________________________________________________
19. Give an example of each kind of matter:
Element
Compound
Solution
Colloid
20. What is the difference between a “solvent” and a “solute”?
21. Use non-metal atoms only and draw any molecule that has 5 or more atoms within it. You can make the molecule
up. Be sure to draw all valence electrons so that every atom satisfies the Octet Rule.
22. A trophy has a mass of 54 grams and a volume of 13 cm3. What is its density? Please write the formula for density.
Plug in numbers and solve. Include proper units and circle your answer.
23. What units measure density? ___________
24. What units measure mass? ___________
25. What units measure volume? ___________