Atoms and Elements

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Across
  1. 2. This is made up of elements
  2. 4. Which subatomic particles has no mass
  3. 7. Protons and neutrons added together
  4. 10. Name of period 7 on periodic table
  5. 11. Atoms that have the same atoms atomic number but different atomic mass
  6. 14. Who created the current periodic table
  7. 15. Electron configuration of 1s2 2s2 2p6 3s2 3p6
  8. 16. Electrons move around the nucleus, "Who's theory"
  9. 17. Electron configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4p2
  10. 18. A element that has a additional electron or one fewer electron
  11. 19. What is the rarest element on earth
  12. 20. No Charge
Down
  1. 1. Name of Group 18 on the periodic table
  2. 3. what is the isotope of carbon with 6 protons and 8 neutron
  3. 5. Different pieces of the atom
  4. 6. What type of element is Silicon
  5. 8. Electron configuration for [Kr] 5s2 4d4
  6. 9. Found in the top left of each box in the periodic table
  7. 12. what is between groups 2 and 13
  8. 13. What number is unique to every element on the periodic table