Holly's Crossword

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Across
  1. 2. What is Na?
  2. 5. Outermost shell is named in (1 word)
  3. 6. What is Ca?
  4. 9. Minus in atoms
  5. 12. Iron + oxygen
  6. 13. Plus in atoms
  7. 15. The first letter has to be what in the periodic table
  8. 16. Good conductor of heat, Shiny, & Malleable
  9. 17. The group that is in group 0 in periodic table
Down
  1. 1. ? is iron oxide a reddish brown substance
  2. 3. Iron & sulfur?
  3. 4. How tightly they are packed
  4. 7. Starts with an O & is in periodic table
  5. 8. What is K?
  6. 10. Appearance of metal
  7. 11. Metals melting point
  8. 13. Substances in apple called ?, react with oxygen to form an brown pigment called melanin
  9. 14. How many atoms can fit in first shell