Atoms and the Periodic Table

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Across
  1. 3. A sub-atomic particle which is neutral (no charge) and a mass of 1
  2. 7. The rows across the periodic table
  3. 8. The solid centre of the particle, made up of protons and neutrons
  4. 9. The name of the part of the atom where electrons can be found
Down
  1. 1. A sub-atomic particle with a positive charge and a mass of 1
  2. 2. One of the simplest form of particle, the building blocks of life!
  3. 4. A sub-atomic particle with a negative charge and a mass of almost 0.
  4. 5. The columns going down the periodic table
  5. 6. The scientist who created the periodic table