|An atom is mostly ____ with a tiny dense nucleus.
|The temperature at which a solid turns into a liquid is its ____.
|The molecular attraction between dissimilar molecules is ____.
|There are about 28 grams in one ____.
|The air we breathe is about 78% ____ and 21% oxygen.
|The lightest ____ is fluorine (F).
|Water is the ____ in all aqueous solutions.
|An atom's ____ contains protons and neutrons.