Biology Chapter 2 Test

There are 98 naturally occurring elements and only 4 that comprise 95% of life.

• True

• False

In an ionic bond, atoms will share electrons to form new stable molecules.

• True

• False

Hydrogen bonds are weak bonds that form between water molecules.

• True

• False

As a rule most atoms will have 1 proton for every 1 electron.

• True

• False

The number of protons in an atom refers to the

• atomic mass

• atomic weight

• atomic number

• atomic structure

The sum of protons and neutrons in an atom make up the

• atomic weight

• atomic number

• atomic structure

• atomic mass

Which type of chemical bond will require a transfer of electrons from one atom to another?

• ionic bond

• covalent bond

• atomic bond

• hydrogen bond

When an atom gains an electron, it will become negatively charged and called an

• cation

• anion

• ration

• none of the above

How many electrons can the first orbital of an atom hold?

• 2

• 4

• 6

• 8

Which of the following is considered a polysaccharide?

• glucose

• galactose

• fructose

• glycogen