Element Crossword

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Across
  1. 2. The rows on a periodic table
  2. 3. A subatomic particle of about the same mass as a proton but without an electric charge
  3. 7. The columns on a periodic table
  4. 8. The percentage of atoms with a specific atomic mass found in a naturally occurring sample of an element
  5. 11. Element with the atomic mass of 183.84
  6. 13. Element with the atomic number 76
  7. 14. The process by which ions are formed by gain or loss of an electron from an atom or molecule
  8. 15. Element with the chemical symbol Sn
Down
  1. 1. Number of electrons located in the highest energy level of an element
  2. 4. Element with the atomic number 1
  3. 5. A negatively charged subatomic particle that can be either bound to an atom or free
  4. 6. A subatomic particle with a positive electrical charge
  5. 9. The number of protons in the nucleus of an atom
  6. 10. The mass of an atom
  7. 12. Element with the atomic symbol Ag