CROSSWORD- CHEMISTRY

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Across
  1. 2. THEY ARE ELECTROMAGNETIC RADIATIONS HAVING WAVELENGTH LESS THAN THE X RAYS
  2. 6. SHORT FORM OF AN ELEMENT
  3. 10. ELEMENTS WHICH GIVE HARMFUL RADIATION
  4. 12. ELEMENT WITH ATOMIC NUMBER 25
  5. 13. THE ENERGY RELEASED BY FUSING NUCLEI OF VERY LIGHT ELEMENTS UNDER EXTREMELY HIGH TEMPERATURE AND PRESSURE
  6. 15. A PURE SUBSTANCE MADE UP OF ONLY ONE KIND OF ATOMS
  7. 17. THE NUMBER OF PROTONS IN THE NUCLEUS OF AN ATOM
  8. 18. THE NEW SUBSTANCES FORMED AS A RESULT OF A CHEMICAL REACTION
Down
  1. 1. THE COMBINING CAPACITY OF AN ELEMENT
  2. 3. THE ATOMS OF SAME ELEMENT HAVING SAME ATOMIC NUMBER BUT DIFFERENT MASS NUMBERS
  3. 4. A MIXTURE IN WHICH DIFFERENT CONSTITUENTS ARE MIXED UNIFORMLY
  4. 5. RADIO ISOTOPE USED FOR TREATMENT OF THYROID GLAND CANCER
  5. 7. NEGATIVELY CHARGED ION
  6. 8. THE SUBSTANCES WHICH TAKE PART IN A CHEMICAL REACTION
  7. 9. A GROUP OF TWO OR MORE DIFFERENT ATOMS HAVING A NET POSITIVE OR NEGATIVE CHARGE
  8. 11. THE SMALLEST UNIT OF MATTER WHICH TAKES PART IN A CHEMICAL REACTION
  9. 14. IRON WITH VALENCY 3
  10. 16. A CHEMICAL COMPOUND IS ALWAYS ELECTRICALLY ________