Structure of the Atom

Front

What is the basic unit of matter?

Back

An atom is the basic unit of matter that consists of a nucleus surrounded by electrons.

Front

What are the three main subatomic particles of an atom?

Back

Protons, neutrons, and electrons.

Front

What charge does a proton carry?

Back

A proton carries a positive charge.

Front

What charge does an electron carry?

Back

An electron carries a negative charge.

Front

What is the mass of a neutron compared to a proton?

Back

A neutron has approximately the same mass as a proton.

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

How is the mass number of an atom calculated?

Back

The mass number is calculated by adding the number of protons and neutrons in the nucleus.

Front

What is the role of neutrons in an atom?

Back

Neutrons help stabilize the nucleus and contribute to the mass of the atom.

Front

What is an ion?

Back

An ion is an atom that has gained or lost one or more electrons, resulting in a net charge.