B 3-4 2024-2025 Atomic Structure Pre-Assessment

Front

What happens to the particles of matter when the temperature increases?

Back

The particles speed up and move farther apart.

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 do you calculate the number of neutrons in an atom?

Back

Number of neutrons = Atomic mass - Atomic number.

Front

If an atom has 10 protons, how many electrons does it have if it is neutral?

Back

It has 10 electrons.

Front

What is atomic mass defined as?

Back

Atomic mass is the total number of protons and neutrons in an atom.

Front

What is the relationship between temperature and particle movement in matter?

Back

As temperature increases, particle movement increases.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (it is neutral).

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons.