Periodic Trends Puzzle Project

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Across
  1. 4. has 6 neutrons, has a higher electron negativity than #2
  2. 6. has 3 more electrons than #1
  3. 10. cation with ionic radius lower then Lithium STAR
  4. 12. has seven protons and neutrons, and makes up about 78.1% of the Earth's atmosphere
  5. 13. nonmetal with nine protons
  6. 14. group one with largest atomic radius, alaki metal thats lighter then water. Magnesium mass of 24.31 in period 2
  7. 15. 8 valence electrons
  8. 16. commonly found in batteries, has the least amount of valence electrons
Down
  1. 1. ends on 3p4
  2. 2. first discovered in space before being found on Earth, has 2 less protons then #6, has the highest ionization energy
  3. 3. extra fact is infinitely recyclable
  4. 5. six valence electrons in period two
  5. 6. has 3 valence electrons, has a smaller atomic radius than #11
  6. 7. charge of -3
  7. 8. Nonmetal With 17 electrons
  8. 9. has mass of 14.045✕ 2
  9. 11. nobel gas with atomic number of ten