Chemistry - Chapter 4 Vocab (Pearson)

Front

One twelfth of the mass of a carbon-12 atom

Back

atomic mass unit

Front

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

Back

atom

Front

A weighted average mass of the atoms in a naturally occurring sample of the element.

Back

atomic mass

Front

The theory that states the following: all elements are composed of atoms, atoms of the same element are identical, atoms of different elements can combine chemically to form compounds, chemical reactions occur when atoms are separated from one another.

Back

Dalton's atomic theory

Front

Subatomic particles with no charge.

Back

neutrons

Front

The number of protons in the nucleus of an atom, which determines the element's identity.

Back

atomic number

Front

The total number of protons and neutrons in an atom's nucleus.

Back

mass number

Front

Atoms of the same element that have different numbers of neutrons.

Back

isotope

Front

The negatively charged subatomic particle that orbits the nucleus of an atom.

Back

electron

Front

The positively charged subatomic particle found in the nucleus of an atom.

Back

proton