Atomic Structure

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What are the three main subatomic particles?

Back

The three main subatomic particles are protons, neutrons, and electrons.

Front

What charge do protons carry?

Back

Protons carry a positive charge.

Front

What charge do electrons carry?

Back

Electrons carry a negative charge.

Front

What charge do neutrons carry?

Back

Neutrons have no charge (neutral).

Front

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

Back

Protons and neutrons have approximately the same mass, which is about 1 atomic mass unit (amu).

Front

What is the nucleus of an atom?

Back

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

Front

How do you calculate the atomic mass of an element?

Back

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

Front

What is an isotope?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

What is the electron cloud?

Back

The electron cloud is the region around the nucleus where electrons are likely to be found.