Atomic structure

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Across
  1. 3. A particle in the nucleus with no charge.
  2. 4. A very small piece of matte
  3. 7. A negative particle that moves around the nucleus.
  4. 9. The charge of a proton.
  5. 10. A tiny particle that makes up everything.
  6. 11. Having no overall charge.
Down
  1. 1. Two or more substances together, not chemically joined.
  2. 2. The charge of an electron.
  3. 4. A positive particle in the nucleus.
  4. 5. A substance made from only one type of atom.
  5. 6. NUMBER The number of protons in an atom.
  6. 8. The centre of an atom.