Atoms and Their Properties

Front

What is the smallest unit of matter?

Back

An atom.

Front

What are the three main subatomic particles of an atom?

Back

Protons, neutrons, and electrons.

Front

Which subatomic particle has a positive charge?

Back

Proton.

Front

Which subatomic particle has no charge?

Back

Neutron.

Front

Which subatomic particle has a negative charge?

Back

Electron.

Front

What is the nucleus of an atom?

Back

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

Front

What determines the atomic number of an element?

Back

The number of protons in the nucleus.

Front

What is an ion?

Back

An atom that has gained or lost electrons, resulting in a charge.

Front

What is the difference between an atom and a molecule?

Back

An atom is a single unit of an element, while a molecule is a group of two or more atoms bonded together.

Front

What is the role of electrons in chemical bonding?

Back

Electrons in the outer shell of atoms participate in forming bonds with other atoms.