Chemistry MP4 Mastery Review

What two types of atoms make a covalent bond?

• 2 Nonmetals
• 1 Nonmetal and 1 Metal
• 2 Metals
• 2 Noble Gases

When two nonmetals do not share electrons evenly, the resulting covalent bond will be

• nonpolar

• polar

• ionic

• metallic

Which category of elements usually form negative ions?

• metals

• nonmetals

• metalloids

• noble gases

What is a valence electron?

• an electron that is found in the outermost shell of an atom.

• an electron found in the innermost shell of an atom.

• an electron found in the middle shell.

According to the octet rule most elements need _______ valence electrons.

• 2
• 8
• 6
• 18

_{Which atoms bond together to create a water molecule?}

• Oxygen and Hydrogen
• Carbon and Oxygen
• Hydrogen and Helium
• Helium and Carbon

This atom in a water molecule has more of a negative charge

• hydrogen

• oxygen

The positive ions tend to _____________ electrons.

• lose

• gain

The negative ions tend to _____________ electrons.

• lose

• gain

When an atom loses an electron, it becomes a

• positive ion

• negative ion

• neutral ion

• neutral atom