Physical Science Chapter 11 Vocab Words

Front 1

Atom

Back 1

The smallest unit of an element that maintains the properties of that element

Front 2

Electron

Back 2

A subatomic particle that has a negative charge

Front 3

Nucleus

Back 3

In physical science, an atom's central region, which is made up of protons and neutrons

Front 4

Electron Cloud

Back 4

A region around the nucleus of an atom where electrons are likely to be found

Front 5

Proton

Back 5

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

Front 6

Atomic Mass Unit

Back 6

A unit of mass that describes the mass of an atom or molecule

Front 7

Neutron

Back 7

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

Front 8

Atomic Number

Back 8

The number of protons in the nucleus of an atom; the atomic numbe is the same for all atoms of an element

Front 9

Isotope

Back 9

An atom that has the same number of protons (or the same atomic number) as other atoms of the same element do but that has a different number of neutrons (and thus a different atomic mass)

Front 10

Mass Number

Back 10

The sum of the numbers of protons and neutrons in the nucleus of an atom

Front 11

Atomic Mass

Back 11

The mass of an atom expressed in atomic mass units