|A heavy silvery toxic liquid metal element is ____ .
|Salt water is a both a mixture and an ____ solution.
|A solute is dissolved in a solvent to form a ____.
|Water is the ____ in all aqueous solutions.
|Glass, rocks, oils, and plastics are water ____.
|Pure diamond and pure ____ contain only carbon atoms.
|An atom is mostly ____ with a tiny dense nucleus.
|Sugar dissolving and ice melting are ____ changes.