The Periodic Table Review (Yr 10)

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Across
  1. 2. Extended 3D structure
  2. 3. Core of an atom
  3. 9. Small group of atoms bonded together
  4. 13. 118 of these are known to exist
  5. 14. A special block of elements in groups 3–12
  6. 16. Bonding between non-metallic atoms
  7. 18. Formed when electrons transfer from one atom to another
  8. 19. Bonding based on an electron ‘sea’
  9. 21. Different forms of the same element
Down
  1. 1. One of two special blocks of elements at the bottom of the periodic table
  2. 4. Shows how electrons are arranged in their shells
  3. 5. Bonding that involves complete transfer of electrons
  4. 6. Non-metals that are in group 17
  5. 7. Group 18 gases
  6. 8. Exists as single atoms
  7. 10. The lightest of all the elements
  8. 11. Horizontal rows in the periodic table
  9. 12. Elements that have the same proton number but different numbers of neutrons
  10. 15. Number that tells you how many protons are in the nucleus
  11. 17. Metals that are in group 1
  12. 20. Vertical columns in the periodic table