Chemistry

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Across
  1. 2. The particles in an atom that have a neutral charge.
  2. 3. The quantity of matter contained in an atom of an element.
  3. 5. Tiny particles inside the centre of an atom.
  4. 8. A negatively charged subatomic particle.
  5. 9. Name of group 1 in the periodic table.
  6. 10. Name of group 7 in the periodic table.
Down
  1. 1. Atoms that have the same number of protons & electrons, but a different number of neutrons.
  2. 4. Who created the periodic table?
  3. 6. A substance that combines more than on metal.
  4. 7. What is it called when a metal & non-metal gives an electron?