Periodic table of elements

12345678910111213
Across
  1. 2. has Atomic number 27.Atomic mass 59.
  2. 4. Looks like a container full of air.
  3. 7. Is frequently used in soap and glass.
  4. 10. Discovered in 1774.
  5. 11. is the second most abundant element on the planet.
  6. 12. has 31 protons.
  7. 13. has 12 neutrons.
Down
  1. 1. Physical Property is silver.
  2. 3. Chemical symbol Cu.
  3. 5. Atomic mass is 47.867(48)
  4. 6. discovered by Antoine Lavoisier.
  5. 8. Atomic number is 11.
  6. 9. !0% of weight of living organisms is hydrogen.
  7. 10. Calcium is in the food.