Printer-friendly version

Browse the glossary using this index

Special | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | ALL

E

electron

negatively charged, subatomic particle of relatively low mass located outside the nucleus

element

substance that is composed of a single type of atom; a substance that cannot be decomposed by a chemical change

empirical formula

formula showing the composition of a compound given as the simplest whole-number ratio of atoms

exact number

number derived by counting or by definition

extensive property

property of a substance that depends on the amount of the substance