Across
- 4. The arrangement of elements in the order of increasing atomic number in a table.
- 5. A fuel formed from the remains and skeletons of dead matter from over a million years ago.
- 6. The smallest part of an element.
- 7. The mass of a substance divided by its volume.
- 9. The change of state from solid to liquid.
Down
- 1. A small charged particle found rotating around the nucleus of an atom.
- 2. The amount of solute that dissolves in a given quantity of solvent.
- 3. An unreactive element found in group 0 of the periodic table.
- 4. A charged particle found in the nucleus of an atom.
- 8. The central section of an atoms which contains protons, neutrons and electrons.