Atoms and Matter

Front

What is mass?

Back

A measurement of the amount of matter in something, measured in kilograms. It is similar to weight but not the same.

Front

What is a neutron?

Back

A subatomic particle found in the atom's nucleus with no charge, having the same mass as a proton.

Front

What is a proton?

Back

A subatomic particle with a positive charge found in the atom's nucleus. The number of protons determines the element.

Front

What is matter?

Back

Anything that has mass and takes up space (volume).

Front

What is the nucleus of an atom?

Back

The core of an atom that contains protons and neutrons, where most of the mass is located.

Front

What is an atom?

Back

The basic unit of a chemical element, consisting of a nucleus surrounded by electrons.

Front

What is an electron?

Back

A subatomic particle with a negative charge that orbits the nucleus of an atom.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom, which defines the element.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is an isotope?

Back

Atoms of the same element that have the same number of protons but different numbers of neutrons.