Chemical Names & Formulas

Front

What is the chemical formula for ammonium?

Back

NH₄⁺

Front

What is the chemical formula for sulfate?

Back

SO₄²⁻

Front

How do you determine the number of atoms in a chemical formula?

Back

Count the subscripts for each element; if no subscript is present, it is 1.

Front

What is the charge of a sodium ion?

Back

Na⁺ (sodium ion has a +1 charge)

Front

What is the chemical formula for sodium carbonate?

Back

Na₂CO₃

Front

What is the correct name for the compound with the formula Fe(OH)₃?

Back

Iron (III) hydroxide

Front

What is the significance of parentheses in chemical formulas?

Back

Parentheses indicate that the enclosed group of atoms is a polyatomic ion and may have a subscript applied to the entire group.

Front

What is the chemical formula for lead (II) oxide?

Back

PbO

Front

How many oxygen atoms are in (NH₄)₂SO₄?

Back

4 oxygen atoms.

Front

What is the formula for ammonium carbonate?

Back

(NH₄)₂CO₃