Counting Atoms

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

How do you count the total number of atoms in a compound?

Back

Add the subscripts of each element in the chemical formula.

Front

What does the subscript in a chemical formula indicate?

Back

The subscript indicates the number of atoms of that element in the molecule.

Front

In the compound C2H8O, how many hydrogen atoms are there?

Back

There are 8 hydrogen atoms.

Front

What is the chemical formula for sodium chloride?

Back

The chemical formula for sodium chloride is NaCl.

Front

How many sodium atoms are in 6NaCl?

Back

There are 6 sodium atoms.

Front

What is the total number of atoms in C6H12O6?

Back

There are 24 total atoms (6 C, 12 H, 6 O).

Front

How many elements are present in the compound C6H12O6?

Back

There are 3 elements: Carbon (C), Hydrogen (H), and Oxygen (O).

Front

What is the chemical formula for magnesium chloride?

Back

The chemical formula for magnesium chloride is MgCl2.