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

Smallest unit of most compounds that displays all of the properties of that compound

Back

A molecule is the smallest unit of a chemical compound that retains its chemical properties.

Front

Substance formed by the chemical combination of two or more elements

Back

A compound is a substance formed when two or more different elements chemically bond together.

Front

Negatively charged subatomic particle

Back

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

Front

The center of an atom containing protons and neutrons

Back

The nucleus is the dense central core of an atom, containing protons and neutrons.

Front

The number of protons in the nucleus of an atom

Back

Atomic number is the number of protons in the nucleus of an atom, determining the element's identity.

Front

Atoms of the same element with different numbers of neutrons

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

A charged particle formed when an atom gains or loses electrons

Back

An ion is a charged atom or molecule that has lost or gained one or more electrons.