Question

Jenny is studying a compound that has two oxygen atoms and one nitrogen atom. Which statement describes the subscripts she will use to write the chemical formula?
Responses

She will use two 2s and one 1 as subscripts.
She will use two 2s and one 1 as subscripts.

She will use one 2 as a subscript.
She will use one 2 as a subscript.

She will use one 2 and one 1 as subscripts.
She will use one 2 and one 1 as subscripts.

She will use one 3 as a subscript.
She will use one 3 as a subscript.

Answer 1

She will use one 2 and one 1 as subscripts. (That gives NO2; the 1 for nitrogen is usually omitted, so the formula is written as NO2.)