chapter 2 quiz

Question 1

Which four of the 92 naturally occurring elements make up approximately 96% of the mass of the human body?

Answer 1

carbon, hydrogen, nitrogen, oxygen

Question 2

The chemical behavior of an atom depends primarily upon which of the following?

Answer 2

the number of electrons in the valence shell

Question 3

When two atoms are equally electronegative, they will interact to form

Answer 3

nonpolar covalent bonds

Question 4

Unequal sharing of electrons between atoms will result in which of the following interactions?

Answer 4

a polar covalent bond

Question 5

A covalent bond is formed by

Answer 5

sharing of a pair of electrons between two atoms

Question 6

The attraction between the slight negative charge of one water molecule to the slight positive charge of another water molecule results in which of the following interactions?

Answer 6

a hydrogen bond

Question 7

Which of the following effects is produced by the high surface tension of water?

Answer 7

A water strider can walk across the surface of a small pond

Question 8

Conversion of liquid water to water vapor requires breaking which of the following types of bonds?

Answer 8

hydrogen bonds

Question 9

Why does ice float in liquid water?

Answer 9

Hydrogen bonds stabilize and keep the water molecules of ice farther apart than the water molecules of liquid water.

Question 10

Hydrophobic substances such as vegetable oil are

Answer 10

nonpolar substances that repel water molecules.