Chemical Bonds

If an atom has no charge, which of the following must be true?

• a. It has more neutrons than protons or electrons.

• b. There are only neutrons inside the atom.

• c. Its number of protons is equal to its number of electrons.

• d. The neutrons in the atom outnumber the electrons and protons.

Based on what you know about atomic structure, what can you infer about the word "nuclear?"

• a. It relates to protons and neutrons.

• b. It relates to electrons.

• c. It relates to neutrons only.

• d. It relates to ions only

What is an ion?

• a. An ion contains the same number of protons as electrons.

• b. A particle with a positive or negative charge

• c. The smallest building block

• d. Ions are where electrons travel

An atom with 10 electrons must have how many shells?

• a. 1

• b. 2

• c. 8

• d. 10

An atom has 15 total electrons. How many electrons does it have in its outer shell?

• a. Three b.

• b. Four

• c. Five

• d. Six

The relationship between the number of electrons in an atom's outer shell and the atom's tendency to bond is called the octet rule. What can you infer about the meaning of "octet?"

• a. It refers to negative charges.

• b. It refers to sets of eight.

• c. It refers to explosive substances.

• d. It refers to different states of matter.

Atom A has seven electrons in its outer shell. Atom B has one electron in its outer shell. They react and bond. Now both atoms have eight electrons in their outer shells. What kind of bond has formed?

• a. Covalent

• b. Ionic

• c. Metallic

• d. Electron

Cations have positive charges. Anions have negative charges. What force draws the two together?

• a. Magnetic attraction

• b. Ionic attraction

• c. Electromagnetic attraction

• d. Electrostatic attraction

Substance M is a blue, brittle solid. Substance N is a colorless, flammable gas. What can we predict about the compound created when M and N form a covalent bond?

• a. It will be a liquid, since M is a solid and N is a gas.

• b. It will be blue, since M is blue and N is colorless.

• c. It will probably be flammable, since N is flammable.

• d. There's no way to tell based on the information given.