|The ____ constant is 6.022 x 1023 per mole.
|All atoms of an element have the ____ number of protons.
|Iron rusting, milk souring, and wood burning are ____ changes.
|A ____ cylinder is better than a beaker for measuring volumes.
|The ability of a substance to combine chemically is its ____.
|There are ____ naturally occurring elements on Earth.
|Bicarbonate, nitrate, and ____ anions have a charge of -1.
|The basic unit of a chemical compound is a ____.