Chemistry Definitions

Anything that has mass and occupies space

Matter that contains only one kind of particle

Matter that contains only one kind of particle

A pure substance that cannot be broken down into simpler parts by chemical methods

A pure substance made of two or more different elements that are chemically combined

A characteristic of a substance that can be observed and measured without changing the identity of the substance

The measure of a substance's resistance to flow

The temperature at which a solid turns into a liquid

The temperature at which a liquid turns into a gas

The ability of a substance to dissolve in another substance

The ratio of the mass of a substance to the volume it occupies

The number of protons in the nucleus of an atom

Sum of the number of protons and the number of neutrons in the nucleus

One of two or more forms of an element that have the same number of protons but a different number of neutrons

The average mass of naturally occurring isotopes of an element

A system for organizing the elements into columns and rows, so that elements with similar properties are in the same column

Typically, an element that is hard, shiny, malleable, and ductile and is a good conductor of heat and electricity

Typically an element that is not hard, shiny, malleable, and ductile and is a poor conductor of heat and electricity

An element that shares some properties with metals and some properties with non-metals

A horizontal row of elements in the periodic table

A vertical column of elements in the periodic table

An electron in the outermost occupied energy level of an atom

A negatively or positively charged atom or group of atoms

A chemical link between two atoms which holds the atoms together

A chemical bond that forms between oppositely charged ions

A compound made of oppositely charged ions