Atoms and Elements

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 parts of an atom?

Back

Protons, neutrons, and electrons.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of a neutron?

Back

Neutral (no charge).

Front

What is the charge of an electron?

Back

Negative.

Front

Where are protons located in an atom?

Back

In the nucleus.

Front

Where are neutrons located in an atom?

Back

In the nucleus.

Front

Where are electrons located in an atom?

Back

In the electron cloud surrounding the nucleus.

Front

What determines the atomic number of an element?

Back

The number of protons in the nucleus.

Front

What is atomic mass?

Back

The weighted average mass of an element's isotopes, measured in atomic mass units (amu).