Atoms and Periodic Table

Smallest unit of an element

• molecule

• element

• atom

• proton

A group of atoms bonded together

• atom

• molecule

• element

• nucleus

Tags

NGSS.MS-PS1-1

A subatomic particle that has a positive charge and that is found in the nucleus of an atom

• neutron

• proton

• atom

• electron

A substance made up of atoms of two or more different elements joined by chemical bonds

• compound

• atom

• element

• molecule

Tags

NGSS.MS-PS1-1

A subatomic particle that has no charge and that is found in the nucleus of an atom

• neutron

• proton

• atom

• electron

A subatomic particle that has a negative charge,found outside the nucleus in the electron cloud

• neutron

• proton

• atom

• electron

Area surrounding an atom's nucleus. Each shell/level contains a specific number of electrons. Also, known as electron cloud

• nucleus

• proton

• valence electron

• electron shell

Center of an atom; contains protons and neutrons

• nucleus

• proton

• valence electron

• electron shell

an electron that is found in the outermost shell of an atom and that determines the atom's chemical properties

• nucleus

• protons

• valence electrons

• neutrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The ability of an atom or molecule to undergo a chemical reaction with another atom or molecule

• nucleus

• solubility

• reactivity

• matter

Tags

NGSS.MS-PS1-2