Counting Atoms

Front

If there is no subscript in a chemical formula, how many atoms of that element are present?

Back

1

Front

What does a subscript behind a set of parentheses indicate?

Back

It belongs to all the elements within the parentheses before it.

Front

How many magnesium atoms are present in the compound MgCl2?

Back

1

Front

Which element is not found in the compound NaNO3?

Back

Hydrogen

Front

What does a subscript tell you about the number of atoms of the element before it?

Back

It indicates the number of atoms of that element.

Front

What is a chemical formula?

Back

A representation of a substance using symbols for its constituent elements and numbers to indicate the quantity of each.

Front

What is the significance of subscripts in chemical formulas?

Back

They indicate the number of atoms of each element in a molecule.

Front

In the formula H2O, how many hydrogen atoms are there?

Back

2

Front

In the formula C6H12O6, how many oxygen atoms are present?

Back

6

Front

What does the formula NaCl represent?

Back

Sodium chloride, which consists of one sodium atom and one chlorine atom.