Elements of the Periodic Table

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Across
  1. 2. The Mass Number of ___ is 7.
  2. 5. This element comes after potassium.
  3. 7. 1st shell:2, 2nd shell:8, 3rd shell:7. Symbol is “Cl”
  4. 8. The 10th element of the periodic table.
  5. 11. The mass number is 31, the atomic number is 14.
  6. 13. Argon’s mass number is ___.
  7. 15. Carbon’s atomic mass is ___.
  8. 17. The atomic number is 8.
  9. 18. This element’s symbol is “Na”
  10. 19. Beryllium has how many protons?
Down
  1. 1. This element is after aluminium on the periodic table.
  2. 3. ___ has 9 protons and 10 neutrons.
  3. 4. The 14th element of the period table.
  4. 6. This element has 13 protons.
  5. 9. This element comes before oxygen on the periodic table.
  6. 10. The Atomic number of ___ is 1.
  7. 11. This element’s symbol is “K”
  8. 12. This element has 2 protons, 2 neutrons, 2 electrons.
  9. 14. What is the mass number of magnesium?
  10. 16. The 5th element of the periodic table.