Chemistry

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Across
  1. 8. 1kg gold or 1 kg wool
  2. 9. what is the first element of the periodic table
  3. 11. what orbits the electron shell
  4. 12. what atom has neutral charge
  5. 14. how many protons does argon have
  6. 16. has 5 protons and the atomic number is 11
  7. 20. atom have
  8. 21. how many protons does oxygen have
  9. 22. how many protons do lithium have
  10. 23. how many neutron does pottassium have
  11. 24. how many protons are there in berylium
  12. 25. what atom has positive charge
Down
  1. 1. has proton and neutron
  2. 2. how much does sodium neutron have
  3. 3. how much does proton
  4. 4. who came up with atom structure
  5. 5. what alkali metal is the most reactive
  6. 6. how much atomic number have the sodium
  7. 7. which group does the alkali metals belong
  8. 10. where rutherford was born
  9. 13. how many protons does hydrogen have
  10. 15. what atom has negative charge
  11. 17. who did the gold foil experiment
  12. 18. which alkali metal have the highest melting point
  13. 19. how many electrons are there in atom of carbon