Counting Atoms LOCOM

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together. For example, CO2 is a molecule made of one carbon atom and two oxygen atoms.

Front

How many molecules are in 5CO2?

Back

5 molecules.

Front

How many elements are in CO2?

Back

2 elements: carbon (C) and oxygen (O).

Front

What is the total number of atoms in NaOH?

Back

3 atoms: 1 sodium (Na), 1 oxygen (O), and 1 hydrogen (H).

Front

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

Back

6 sodium (Na) atoms.

Front

How many hydrogen atoms are in H2O?

Back

2 hydrogen atoms.

Front

How many elements are in NaOH?

Back

3 elements: sodium (Na), oxygen (O), and hydrogen (H).

Front

What does the subscript in a chemical formula indicate?

Back

The subscript indicates the number of atoms of the element in the molecule. For example, in H2O, the '2' indicates there are 2 hydrogen atoms.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is made up of two or more atoms bonded together.

Front

How do you determine the number of atoms in a chemical formula?

Back

Count the number of each type of atom represented in the formula, including subscripts.