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