Atomic Structure and Periodic Table Vocabulary

Vocabulary flashcards defining key atomic and periodic table concepts from the provided transcript.

Atom

The basic unit of a chemical element.

Proton

A subatomic particle that has positive charge.

Neutron

A subatomic particle that has no charge that is located in an atom.

Electron

A subatomic particle that has a negative charge.

Valence electron

An electron that is found in the outermost shells, which determines chemical properties in physical science.

Nucleus

An atom's central region which is made up of protons & neutrons.

Electron cloud

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

Group

A vertical column of elements in the periodic table of elements.

Period

In chemistry, a horizontal row of elements in the periodic table.

Metals

An element that is shiny and that conducts heat & electricity well.

Non-metals

An element that conducts heat & electricity poorly.

Metalloids

An element that has properties of both metals & non-metals.