Chemistry

6. Tells us how many protons in an atom
8. Tells us how many electrons are in each of it's shells
10. Made up of different elements or compounds simply thrown together and can be separated
11. When a solid turns into a gas or a gas turns into a solid
12. Occurs when a chemical reaction is involved and one or more new substances is formed

1. A sub-atomic particle with no charge.
2. The number of neutrons added with the number of protons or electrons
3. A sub-atomic particle with a positive charge
4. The 13th element in the periodic table
5. Shows the order of every element discovered
7. Occurs when a substance changes without forming new substances
8. A substance made up of just one atom
9. A substance made up of molecules or a crystal lattice with different types of atoms
13. Atoms of the same element that may have a different number of neutrons
14. Particles which make up matter