Atomic Structure

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons. It holds most of the atom's mass.

Front

What are protons?

Back

Protons are positively charged particles found in the nucleus of an atom. The number of protons determines the element's identity.

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom. They contribute to the mass of the atom but do not affect its charge.

Front

What are electrons?

Back

Electrons are negatively charged particles that orbit the nucleus of an atom in energy levels or shells.

Front

What is an energy level?

Back

An energy level is a region around the nucleus where electrons are likely to be found. Each level can hold a specific number of electrons.

Front

What is the charge of a proton?

Back

The charge of a proton is +1.

Front

What is the charge of a neutron?

Back

Neutrons have no charge; they are neutral.

Front

What is the charge of an electron?

Back

The charge of an electron is -1.

Front

Where is most of the mass of an atom located?

Back

Most of the mass of an atom is located in the nucleus.

Front

What is the atomic number?

Back

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