Middle School Chemistry Vocabulary

The number of protons in the nucleus of an atom

• atomic mass units

• mass number

• atomic number

• nuclear force

Unstable nuclei that emit rays or particles to become stable are said to???

• radioactive

• react

• isotopes

• decay

The smallest particle of an element that retains its identity in a chemical reaction.

• electron

• atom

• quark

• neutrons

Tags

NGSS.MS-PS1-5

The total number of protons and neutrons in the nucleus of an atom?

• mass number

• atomic number

• atomic mass units

• Law of Conservation of Mass

Negatively charged subatomic particles.

• protons

• quarks

• neutrons

• electrons

Tags

NGSS.MS-PS2-3

Atoms of the same element that differ in mass.

• electrons

• molecules

• isotopes

• quarks

Subatomic particles with no charge but was a mass equal to that of a proton.

• electron

• nucleus

• isotopes

• neutrons

Positively charged subatomic particles.

• neutrons

• protons

• electrons

• isotopes

Substance produced in a reaction.

• reactant

• product

• substance

• mass

Tags

NGSS.MS-PS1-2

Anything that has mass and takes up space.

• matter

• volume

• phase

• solid