Chemical Bonds

What kind of bond forms when atoms share electrons?

• ionic

• covalent

• artificial

• univalent

What are valence electrons?

• sum of the protons and neutrons

• protons minus electrons

• electrons in the inner shells

• electrons in the outer shell

What kind of bond forms when atoms exchange electrons?

• ionic

• covalent

• artificial

• univalent

If an atom loses two electrons what charge will it have?

• -2

• -1

• +1

• +2

If an atom gains two electrons what charge will it have?

• -2

• -1

• +1

• +2

How many valence electrons does oxygen have?

• 2

• 4

• 5

• 6

An electron has what kind of charge?

• positive

• negative

• neutral

• none of these

The 1st shell (energy level) can hold up to ___ electrons, while the 2nd and 3rd shells can hold up to 8 electrons.

• 2

• 4

• 6

• 8

Other than H and He, how many electrons do atoms want to have in their outer shell to be FULL and HAPPY?

• 4

• 6

• 8

• 10

With covalent bonds, electrons are _____ between the atoms.

• lost and gained

• shared