Atoms and the Periodic Table

Front

What is an atom?

Back

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

Front

What are the three main particles in an atom?

Back

Protons, neutrons, and electrons.

Front

What charge do protons have?

Back

Protons have a positive charge.

Front

What charge do electrons have?

Back

Electrons have a negative charge.

Front

What charge do neutrons have?

Back

Neutrons have no charge (they are neutral).

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the mass number?

Back

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

Front

What is the periodic table?

Back

The periodic table is a chart that organizes all known elements by their atomic number, electron configuration, and recurring chemical properties.

Front

What group is Sodium (Na) in?

Back

Sodium (Na) is in Group 1 of the periodic table.

Front

What group is Magnesium (Mg) in?

Back

Magnesium (Mg) is in Group 2 of the periodic table.