|Electrons are located in ____ around an atom's nucleus.
|Unlike some ____, all compounds are homogeneous.
|A spoonful of table salt (NaCl) is composed of two ____.
|Na and Cl are the ____ for sodium and chlorine.
|A water molecule (H2O) has one oxygen and two hydrogen ____.
|Solid nonmetals are good ____ of heat and electricity.
|Atoms can be joined together by ____ to form molecules.
|Mass number minus atomic number equals number of ____.