Chemistry Vocab (Gr 9)

A characteristic of a substance that can be described, but not measured

The outside “shell” of electrons that surrounds the nucleus of an atom

The number of protons in the nucleus

A pure substance made up of 2 or more elements that are chemically combined

A family of element with 6 valence electrons; Oxygen family

-O, S, Se, Te, Po

A characteristic of a substance that can be measured

A particle carrying no electric charge and forming part of the nucleus of an atom

A vertical column of elements on the Periodic table.

A type of substance that can NOT be broken down into simpler parts by ordinary chemical means (e.g. oxygen, gold)

A property used to characterize materials in reactions that change their identity