Periodic Table

Edit Answers
123456789
Across
  1. 2. a chemical element with the symbol Ra and atomic number 88
  2. 5. a chemical element with symbol Sm and atomic number 62
  3. 7. a chemical element with the symbol Si and atomic number 14
  4. 8. a chemical element with the symbol Pb and atomic number 82
  5. 9. a chemical element with the symbol Sn and atomic number 50
Down
  1. 1. the chemical element with the symbol K and atomic number 19
  2. 3. a synthetic element with the symbol Es and atomic number 99
  3. 4. is the chemical element with the symbol H and
  4. 6. number 1