An alteration of a substance that does not change its chemical composition

The part of an atom that contain a positive charge

The number of protons in an atom

Uncharged atomic particles

The total number of protons and neutrons in an atom's nucleus

Negative charge and moves around the nucleus

The average mass of a sample of atoms of that element found in nature

The dense core of an atom

Forces that hold atoms together

Charged particles

The bond formed by the transfer of electrons between atoms

Result when atoms share electrons with each other

Compounds that result when metals and nonmetals bond ionically with each other

Compounds formed by the sharing of electrons

The written description of a chemical reaction, using symbols and formulas

The elements or compounds present at the start of a reaction

The elements or compounds formed during the reaction

The elements or compounds formed during the reaction

When a liquid changes to a gas

When a gas changes to a liquid

Anything that has mass and takes up space

A feature that helps identify a substance

Characteristic that can be observed/measured without changing the substance into something else

Physical state in which matter can exist

Definite shape and volume

The ability of a substance to react with other substances

Definite volume, but not a definite shape

Made up of only one kind of material and has definite properties

Neither definite volume nor shape

Simplest form of matter than can exist under normal lab conditions

The smallest particles of an element that keep its chemical properties

Substance made of two or more different elements chemically joined together

the smallest unit of a molecular compound

Combination of 2 or more substance in which each keeps at least some of its original properties

Individual substances are dissimilar and can be recognized by sight

Same in every part of a given sample and components cannot be identified by sight

Chemist's abbreviations of the names of elements

Represents a compound