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 subatomic particles?

Back

Protons, neutrons, and electrons.

Front

What charge does a proton have?

Back

A proton has a positive charge.

Front

What charge does a neutron have?

Back

A neutron has no charge (neutral).

Front

What charge does an electron have?

Back

An electron has a negative charge.

Front

Where are protons located in an atom?

Back

Protons are located in the nucleus of an atom.

Front

Where are electrons located in an atom?

Back

Electrons are located in the electron cloud surrounding the nucleus.

Front

What is the atomic number of an element?

Back

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

Front

What is the mass number of an element?

Back

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

Front

What are groups in the periodic table?

Back

Groups are vertical columns in the periodic table that contain elements with similar properties.