ATOM AND ELEMENTS

Edit Answers
123456789101112131415161718
Across
  1. 6. a reactive gas found in the atmosphere
  2. 9. a green gas that smells like bleach
  3. 10. element with the symbol Ca
  4. 12. ---- number;the sum of the protons and neutrons
  5. 13. name of the group7 elements
  6. 14. ------ chloride aka common salt
  7. 16. name an element beginning with the letter l
  8. 18. element with atomic number 8
Down
  1. 1. element that has only one proton
  2. 2. elements on the left of the periodic table
  3. 3. positively charged sub atomic particle
  4. 4. where the protons and neutrons are found
  5. 5. the only liquid metal
  6. 6. charge on an electron
  7. 7. charge on a neutron
  8. 8. element with symbol Cu
  9. 11. the symbol is Fe
  10. 15. just below oxygen in the periodic table
  11. 17. the number of liquid elements