Similarities and Differences_ M1 ADVANCE

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Across
  1. 3. Element symbol of Sn
  2. 4. symbol is Zr
  3. 7. element with mass number of 64
  4. 9. element with electron of 20
  5. 11. element with proton of 113
  6. 12. element with electron of 8
  7. 14. element with proton of 55
  8. 15. element with atomic mass of 84
Down
  1. 1. element with mass # of 243
  2. 2. element with mass number of 286
  3. 5. element symbol of Fe
  4. 6. element symbol is Og
  5. 8. element with electron of 79
  6. 10. element with proton of 55
  7. 13. element symbol is Yb