The smallest particle of an element that still has all the properties of the element.

• Atom

• Proton

• Electron

• Neutron

The number of protons in the nucleus of an atom.

• Mass Number

• Atomic Number

• Ion Number

• Nucleus Number

A negatively charged particle that moves around the nucleus.

• Proton

• Neutron

• Ion

• Electron

Tags

NGSS.MS-PS2-3

A pure substance that cannot be broken down into simpler substances by ordinary chemical means.

• Electron

• Compound

• Element

• Proton

An atom or molecule that has an electrical charge because it has gained or lost electrons.

• Isotope

• Ion

• Compound

• Element

Tags

NGSS.MS-PS2-3

A given element that has the same number of protons, but differ in the number of neutrons.

• Molecule

• Ion

• Compound

• Isotope

The number of protons plus neutrons in the nucleus of an atom.

• Ion

• Isotope

• Mass Number

• Atomic Number

A particle with no charge located in the nucleus of an atom.

• Neutron

• Proton

• Electron

• Ion

A positively charged particle located in the nucleus of an atom.

• Ion

• Neutron

• Proton

• Electron

Tags

NGSS.HS-PS1-8

Electrons found in the outermost energy level of an atom.

• Valence Electrons

• Cloud Electrons

• Inner Electrons

• Lost Electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2