The Elements

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Across
  1. 2. the only metal in group 10 with an atomic mass less than 100
  2. 3. its name is also the same as the planet where Superman was born
  3. 6. the hound is said to glow with this element in Doyle’s “Hound of the Baskervilles”
  4. 9. in group 9 and has 4 energy levels
  5. 11. solid metal that they make foil out of
  6. 14. this element has the chemical symbol Cu
  7. 15. has an atomic mass of 107.88
  8. 20. this element has 6 val. electrons in the 6th energy level
  9. 21. metal, solid, and has 7 energy levels
  10. 22. has 6 valence electrons, is a metalloid, is a solid
  11. 24. this element is before the split of the actinide series from the elements
  12. 26. a nonmetal gas in group 15
  13. 28. this element is the second down in group 12
  14. 29. this element has a mass number over 100.0 and is in group 15
  15. 30. group 2, period 2
Down
  1. 1. the element above rhenium and below manganese on the PT
  2. 4. the second heaviest element in group 1
  3. 5. this element has 7 electrons in its 4th & outermost energy level
  4. 7. it’s in group 2, period 4
  5. 8. this element has 4^2 divided by 2 electrons
  6. 10. a nonmetal solid in group 14
  7. 12. sits between zinc and germanium
  8. 13. this element’s atomic number is 83
  9. 16. this element has 6 valence electrons and is a nonmetal
  10. 17. lightest metalloid
  11. 18. the element in period 4 between scandium and vanadium
  12. 19. is in group 14 on the PT
  13. 23. this element was named after Albert Einstein
  14. 25. has 7 valence electrons, is a nonmetal, is a solid
  15. 27. atomic symbol is “Y”
  16. 31. pencils once used this to write