A & P Quiz #4

4-Chemistry-Ch. 2

Question #1: A positive ion has:

• A. gained a proton. • B. lost a proton. • C. gained an electron. • D. lost an electron.

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

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.

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

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

Question #6: Write and balance the chemical equations for the following reaction: potassium oxide + water → potassium hydroxide

• A. 2K2O + H2O → 2KOH

• B. K2O + 2H2O → KOH

• C. K2O + H2O → K2OH

• D. K2O + H2O → 2KOH

Question #7: Balance the following equation: ___ CH4 + ___O2 --> ___CO2 + ___H2O

• A. 1 2 1 2 • B. 2 1 2 1 • C. 3 1 2 4 • D. 1 2 3 4

• A. CH4O4

• B. C + 2 H2 + 2 O2

• C. C + H4O4

• D. CO2 + 2 H2O

Question #8: What will be the balanced product(s) of the following reaction: CH4 + 2 O2 ?

Question #9: Balance the following equation: Zn + HCl → ZnCl2 + H2

• A. Zn + 2HCl → ZnCl2 + H2

• B. Zn + H2Cl2 → ZnCl2 + H2

• C. 2Zn + 2HCl → 2ZnCl2 + 2H2

• D. Zn + HCl → ZnCl2 + H2

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 oC?

• 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…