Atoms Vocabulary

Front

What is an Atom?

Back

Building block of elements

Tags

NGSS.MS-PS1-1

Front

Atomic Mass

Back

Mass of an atom = to the number of protons and neutrons

Tags

NGSS.MS-PS1-1

Front

Atomic Mass Unit

Back

Unit of mass used to express atomic and molecular weights

Tags

NGSS.HS-PS1-7

Front

Atomic Number

Back

The number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.

Tags

NGSS.MS-PS1-1

Front

Electron

Back

Negatively charged particle that spins around the outside of the nucleus.

Tags

NGSS.MS-PS2-3

Front

Electron Cloud

Back

The area around an atom's nucleus where electrons are most likely to be found.

Front

Isotope

Back

Two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons.

Front

Mass Number

Back

The total number of protons and neutrons in an atom.

Front

Neutron

Back

Subatomic particle of about the same mass as a proton but without an electric charge. Neutral Charge

Tags

NGSS.HS-PS1-8

Front

Nucleus

Back

Small, dense region consisting of protons and neutrons at the center of an atom.

Tags

NGSS.MS-PS1-1