REVIEW & REHEARSE 2 CHEMISTRY
REVIEW & REHEARSE 2 CHEMISTRY
Q
The atomic number of carbon is 6. Its nucleus must contain:
- a) 6 neutrons and 6 protons.
- b) 3 protons and 3 neutrons.
- c) 6 neutrons and no electrons.
- d) 6 protons and no electrons.
- e) 6 protons and 6 electrons.
The second orbital shell of an atom can hold ____ electrons.
- a) 2
- b) 3
- c) 4
- d) 6
- e) 8
A covalent bond is formed when:
- a) two nonpolar molecules associate with each other in a polar environment.
- b) a positively charged particle is attracted to a negatively charged particle.
- c) one atom gives up electrons to another atom.
- d) two atoms share electrons.
- e) two polar molecules associate with each other in a nonpolar environment.
Which of the following phenomena is most likely due to the high cohesiveness of water?
- a) Lakes and rivers freeze from the top down, not the bottom up.
- b) The fishing spider can walk across the surface of liquid water.
- c) Adding salt to snow makes it melt.
- d) The temperature of Santa Monica Bay, off the coast of Los Angeles, fluctuates less than the air temperature throughout the year.
- e) All of the above are due to the cohesiveness of water.
