A horizontal row of elements in the periodic table

A tiny, negatively charged particle that moves around the outside of the nucleus of an atom.

Small, positively charged particles that are found in the nucleus of an atom.

An arrangement of the elements showing the repeating pattern of their properties.

Elements in the same vertical column of the periodic table; also called family

A one-or-two letter representation of an element

A small particle in the nucleus of the atom, with no electrical charge.

The number of protons in the nucleus of an atom

The average mass of all the isotopes of an element

the way a mineral reflects light from its surface

A term used to describe material that can be hammered or rolled into flat sheets.

A term used to describe a material that can be pulled out into a long wire

The ability of an object to transfer heat

The ease and speed with which an element combines, or reacts with other elements and compounds

The ability of an object to carry an electric current

The in which acids react with some metals so as to wear away the metal

An element that lacks most of the properties of a metal

An element that has some characteristics of both metals and nonmetals

A substance that can conduct electric current under some conditions