Writing Chemical Formulas

Front

What is a chemical formula?

Back

A chemical formula is a way of expressing the composition of a compound using symbols for the elements and numerical subscripts to indicate the number of atoms of each element.

Front

What does the subscript in a chemical formula represent?

Back

The subscript in a chemical formula indicates the number of atoms of the element present in one molecule of the compound.

Front

How do you determine the formula for an ionic compound?

Back

To determine the formula for an ionic compound, balance the total positive and negative charges of the ions to ensure the compound is neutral.

Front

What is the formula for potassium oxide?

Back

K₂O

Front

What is the formula for barium bromide?

Back

BaBr₂

Front

What is the formula for lithium oxide?

Back

Li₂O

Front

What is the formula for calcium phosphide?

Back

Ca₃P₂

Front

What is the formula for calcium oxide?

Back

CaO

Front

What is the charge of a potassium ion?

Back

The charge of a potassium ion is +1.

Front

What is the charge of a bromide ion?

Back

The charge of a bromide ion is -1.