PS Unit 2 Flashcards

Front

Atom

Back

Smallest particle of an element that has its properties; these have equal numbers of protons and electrons

Front

Element

Back

A pure substance made of only one kind of atom

Front

Proton

Back

A subatomic particle with a positive charge found in the nucleus of an atom

Front

Electron

Back

A subatomic particle that has a negative charge

Front

Valence electron

Back

Electrons on the outermost energy level of an atom

Front

Neutron

Back

A subatomic particle in an atom's nucleus that has no charge

Front

Atomic number

Back

The number of protons in the nucleus of an atom

Front

Atomic mass

Back

The average mass of all the isotopes of an element

Front

Mass number

Back

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

Front

Isotope

Back

Atoms of the same element that have different numbers of neutrons