2.1 Vocabulary

Front

Positively or negatively charged atoms

Back

Ions are atoms that have gained or lost electrons, resulting in a net charge.

Front

Number of protons and neutrons in the nucleus of an atom

Back

Atomic mass is the total number of protons and neutrons in an atom's nucleus.

Front

Positively charged subatomic particle found in the nucleus

Back

Protons are positively charged particles located in the nucleus of an atom.

Front

Protons, neutrons, and electrons that make up atoms

Back

Subatomic particles are the building blocks of atoms, consisting of protons, neutrons, and electrons.

Front

Number of protons in the nucleus of an atom

Back

Atomic number is the number of protons in the nucleus, which defines the element.

Front

Neutral subatomic particle found in the nucleus

Back

Neutrons are neutral particles that reside in the nucleus alongside protons.

Front

Negatively charged subatomic particle

Back

Electrons are negatively charged particles that orbit the nucleus of an atom.

Front

The smallest unit of an element that retains its properties

Back

An atom is the basic unit of a chemical element.

Front

The weighted average of the masses of an element's isotopes

Back

Atomic weight is the average mass of an element's isotopes, measured in atomic mass units (amu).

Front

Atoms of the same element with different numbers of neutrons

Back

Isotopes are variants of a particular chemical element that differ in neutron number.