Periodic Table Facts

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Across
  1. 2. Has an atomic mass of 6.941 Lithium
  2. 5. Atomic mass of Oxygen
  3. 7. Number of electrons in Holmium
  4. 9. The atomic number of potassium
  5. 13. Has a planet AS its name
  6. 16. Atomic number of 13
  7. 17. Atomic symbol of Mg
  8. 18. Something we breathe in everyday
  9. 19. Has 30 protons and 35 neutrons
  10. 20. Has a full valence shell (6 letters)
Down
  1. 1. Element named after scientist Albert Einstein
  2. 3. Has an Atomic mass of 74.92
  3. 4. Has a planet IN its name
  4. 6. Number of protons in calcium
  5. 8. Has an atomic number of 14
  6. 10. Element with the same name as a coin
  7. 11. Has a full valence shell (4 letters)
  8. 12. Has 35 protons and 45 neutrons
  9. 14. Element named after scientist Ernest Rutherford
  10. 15. Atomic mass of Helium