Counting Atoms

Front

What is a subscript in a chemical formula?

Back

A subscript is a small number written below and to the right of an element symbol that indicates the number of atoms of that element in a molecule.

Front

How many Sodium (Na) atoms are in 6NaCl?

Back

6

Front

How many Hydrogen atoms are in 4H₂O?

Back

8

Front

How many Oxygen atoms are in H₂O?

Back

1

Front

In the formula MgSO₄, how many more Oxygen atoms are there than Magnesium atoms?

Back

3

Front

What does the term 'molecule' refer to?

Back

A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What is the total number of atoms in the molecule C₆H₁₂O₆ (glucose)?

Back

24

Front

What is the significance of coefficients in a chemical formula?

Back

Coefficients indicate the number of molecules or moles of a substance in a chemical reaction.

Front

How many total atoms are in the compound 2NaCl?

Back

4 (2 Sodium + 2 Chlorine)

Front

What is the formula to calculate the total number of atoms in a molecule?

Back

Total atoms = sum of all subscripts in the chemical formula.