Atomic Review

Front

What is the atomic number?

Back

The atomic number is the number at the top of each square on the periodic table, representing the number of protons in an atom.

Front

What does the atomic number tell you?

Back

The atomic number tells you the number of protons in an atom.

Front

How do you calculate the number of neutrons in an atom?

Back

The number of neutrons can be calculated by subtracting the atomic number from the mass number.

Front

If an element has a mass number of 11 and an atomic number of 5, how many neutrons does it have?

Back

It has 6 neutrons.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in an atom.

Front

How do you find the mass number of an atom with 10 protons and 15 neutrons?

Back

Add the number of protons (10) and neutrons (15) to get a mass number of 25.

Front

Which particle in an atom has a positive charge?

Back

The proton has a positive charge.

Front

What is the charge of an electron?

Back

The electron has a negative charge.

Front

What is a neutron?

Back

A neutron is a subatomic particle found in the nucleus of an atom that has no charge.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.