Bacola 22/23 6.5 Vocab. Atoms Elements Compounds

Front

Basic particle of all elements; smallest unit with element's properties.

Back

Atom

Front

A substance made of two or more chemically combined elements.

Back

Compound

Front

A pure substance that cannot be broken down by chemical or physical means.

Back

Element

Front

A neutral group of two or more atoms held together by bonds

Back

Molecule

Front

Center of an atom

Back

Nucleus

Front

Small, positively charged particles in an atom's nucleus

Back

Proton

Front

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

Back

Neutron

Front

A tiny, negatively charged particle moving around an atom's nucleus.

Back

Electron

Front

A reaction that releases energy, usually as heat

Back

Exothermic Reaction

Front

A reaction that absorbs energy

Back

Endothermic Reaction