Counting Atoms in Chemical Formulas

Front

How many atoms of carbon (C) are in C6H12O6?

Back

6

Front

How many oxygen atoms (O) are in a molecule of H2O?

Back

1

Front

How many elements of carbon (C) are in C6H12O6?

Back

3

Front

What represents the number of atoms in a molecule of a particular element?

Back

Subscript

Front

An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?

Back

15

Front

What is the definition of a subscript in a chemical formula?

Back

A subscript indicates the number of atoms of an element in a molecule.

Front

What is the chemical formula for water?

Back

H2O

Front

How many hydrogen atoms are in the molecule C6H12O6?

Back

12

Front

What does the atomic number of an element represent?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.