Practice Periodic Table Test

Front

Where is a Valence electron located?

Back

The outmost shell.

Front

The Atomic number is known as the _______

Back

Number of Protons in an atom.

Front

How many valence electrons does Aluminum have?

Back

3.

Front

If an element has an atomic number of 11 and a mass number of 23, how many neutrons does it have?

Back

12.

Front

Who created the model of the atom we use today?

Back

Bohr.

Front

What is the definition of an atom?

Back

The smallest unit of a chemical element, consisting of a nucleus surrounded by electrons.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What does the atomic number represent?

Back

The number of protons in the nucleus of an atom.

Front

What are isotopes?

Back

Atoms of the same element that have different numbers of neutrons.

Front

What is a chemical element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.