1. A & P Quiz #4 4-Chemistry-Ch. 2

2. Question #1: A positive ion has: A. gained a proton. B. lost a proton. C. gained an electron. D. lost an electron.

3. Question #2: When two atoms share one or more electrons the reaction is a/an _______ type of bonding. A. ionic B. covalent C. electron D. hydrogen

4. Question #3: The most common elements in the human body by percentage are: A. carbon, potassium, hydrogen, and oxygen. B. carbon, hydrogen, sodium, and oxygen. C. hydrogen, oxygen, nitrogen, and calcium. D. oxygen, carbon, hydrogen, and nitrogen.

5. Question #4: A carbon atom may contain six protons and 8 neutrons. What is its atomic mass: A. pH B. acid C. neutral D. base

6. Question #5: The first shell of an atom holds __ electrons, while the second shell holds __. A. 1..4 B. 2…6 C. 2…8 D. 3…9

7. Question #6: Write and balance the chemical equations for the following reaction: potassium oxide + water → potassium hydroxide A. 2K 2 O + H 2 O → 2KOH B. K 2 O + 2H 2 O → KOH C. K 2 O + H 2 O → K 2 OH D. K 2 O + H 2 O → 2KOH

8. Question #7: Balance the following equation: ___ CH 4 + ___O 2 --> ___CO 2 + ___H 2 O A. 1 2 1 2 B. 2 1 2 1 C. 3 1 2 4 D. 1 2 3 4

9. A. CH 4 O 4 B. C + 2 H 2 + 2 O 2 C. C + H 4 O 4 D. CO 2 + 2 H 2 O Question #8: What will be the balanced product(s) of the following reaction: CH 4 + 2 O 2 ?

10. Question #9: Balance the following equation: Zn + HCl → ZnCl 2 + H 2 A. Zn + 2HCl → ZnCl 2 + H 2 B. Zn + H 2 Cl 2 → ZnCl 2 + H 2 C. 2Zn + 2HCl → 2ZnCl 2 + 2H 2 D. Zn + HCl → ZnCl 2 + H 2

11. Question #10:? The graph shows the relationship between environmental temperature and the pumping rate of an earthworm's aortic arches. If this trend continues, what will most likely be the earthworm's pumping rate at an environmental temperature of 12 o C? A. 7 beats per minute B. 8 beats per minute C. 9 beats per minute D. 10 beats per minute This is a high level, critical synthesis question…