Periodic Table Vocabulary

The weighted average of the masses of all naturally occurring isotopes of an element.

A subatomic particle that has a positive charge and that is located in the nucleus of an atom

A vertical column of elements in the periodic table; elements in a group share chemical properties.

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

The smallest unit of an element that maintains the properties of that element.

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

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

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

An arrangement of the elements in order of their atomic numbers.

The sum of the numbers of protons and neutrons in the nucleus of an atom.

A subatomic particle has no charge and is located in the nucleus of an atom.

An element that has properties of both metals and nonmetals.

The number of protons in the nucleus of an atom.

A one-, two, or three letter abbreviation of the name of an element.

An element that conducts heat and electricity poorly.

A subatomic particle that has a negative charge.