The smallest unit of matter.

• compound

• atom

• molecule

• mixture

Tags

NGSS.MS-PS1-1

A particle smaller than an atom.

• superatomic particle

• proatomic particle

• subatomic particle

• preatomic particle

Tags

NGSS.HS-PS1-8

Which of the following is NOT a subatomic particle?

• neutron

• electron

• nucleus

• proton

subatomic particle with a positive (+) charge

• proton

• neutron

• electron

subatomic particle with a neutral charge (∅); no charge

• proton

• neutron

• electron

subatomic particle with a negative (-) charge

• proton

• neutron

• electron

Which subatomic particles can be found in the nucleus of an atom?

• proton

• neutron

• electron

Which subatomic particle orbits the nucleus of an atom?

• electron

• neutron

• proton

True or False: Electrons in the electron cloud are grouped in distinct "shells".

• TRUE

• FALSE

Tags

NGSS.HS-PS1-1

True or False: The nucleus of an atom contains protons and electrons.

• TRUE

• FALSE