Reactions Unit Review

Front

What is an ionic compound?

Back

An ionic compound is a chemical compound composed of ions held together by electrostatic forces termed ionic bonding. Example: Lithium bromide (LiBr).

Front

What type of bond involves the sharing of three pairs of electrons?

Back

A triple bond involves the sharing of three pairs of electrons between two atoms.

Front

In a chemical equation, which side represents the reactants?

Back

The left side of a chemical equation represents the reactants, which are the starting substances.

Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a formula in a chemical equation to indicate how many molecules or moles of that substance are involved.

Front

How many HCl molecules are needed to balance the equation: Mg + ___ HCl → MgCl2 + H2?

Back

2 HCl molecules are needed to balance the equation.

Front

What is the difference between a subscript and a coefficient in chemical formulas?

Back

A subscript indicates the number of atoms of an element in a molecule, while a coefficient indicates the number of molecules.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is a reactant?

Back

A reactant is a substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction.