Chemical Bonds Review

Magnesium bromide is an ionic compound with the chemical formula MgBr₂. What does the “2” tell you?

• Bromide has a 2 charge.
• There are two magnesium ions to every bromide ion.
• There are two bromide ions for every magnesium ion.
• Bromide has a 2+ charge.

An ionic bond is the attraction between _____.

• similarly charged ions
• oppositely charged ions
• neutral ions
• neutral atoms

Ions that are made of more than one atom are examples of _____.

• polyatomic ions
• negative ions
• positive ions
• neutral ions

What is the chemical name for the compound with the formula Na₂S?

• sodium fluoride
• magnesium sulfide
• lithium oxide
• sodium sulfide

A chemical bond formed when two atoms share electrons is called a (an) _____.

• ionic bond
• covalent bond
• polyatomic bond
• crystal bond

What is the greatest number of valence electrons an atom can have?

• 2
• 3
• 8
• 12

What happens when chemical bonds break and new bonds form?

• a physical change
• a chemical reaction
• matter is destroyed
• surface area increases

CaCO₃ represents a chemical _____.

• symbol
• formula
• subscript
• reaction

A shorter, easier way to show chemical reactions, using symbols instead of words, is called a _____.

• chemical equation
• chemical formula
• symbol
• subscript

The substances listed on the left side of a chemical equation are the _____.

• products
• coefficients
• precipitates
• Reactants