Ready, Steady, React!

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Across
  1. 3. Allows movement of heat/electricity
  2. 8. Subatomic particle with a positive charge
  3. 11. Element with the atomic number 3
  4. 12. 2 or more elements chemically joined together
  5. 14. The horizontal rows of the periodic table
  6. 15. Subatomic particle with a negative charge
  7. 17. Subatomic particle with a neutral/no charge
  8. 18. Protons + neutrons
  9. 20. A substance made of one type of atom
  10. 21. Can be drawn into thin wires
Down
  1. 1. Element with the atomic symbol: K
  2. 2. Easily broken into pieces/ powder
  3. 4. Elements that have properties of metals and non-metals
  4. 5. Found on the right hand side of the periodic table.
  5. 6. Element found in the 13th group and 3rd period
  6. 7. The vertical columns of the periodic table
  7. 9. Where protons and neutrons are found
  8. 10. Element with the atomic mass 10.81g
  9. 13. Found on the left hand side of the periodic table.
  10. 16. A combination of two or more elements that are not bonded together
  11. 19. Has the ability to bend