Atoms and Molecules Flashcard

Front

What is an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What subatomic particle is equal to the atomic number?

Back

The number of protons in an atom is equal to its atomic number.

Front

Which subatomic particle has a negative charge?

Back

The electron has a negative charge.

Front

What is a molecule?

Back

A molecule is formed when two or more atoms bond together, which can be of the same or different elements.

Front

How do you calculate the number of neutrons in an atom?

Back

Number of neutrons = Atomic mass - Atomic number.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom.

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 difference between an atom and a molecule?

Back

An atom is the smallest 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 an atom?

Back

Electrons are responsible for chemical bonding and reactions, as they occupy the outer shells of an atom.