Atomic Structure and the Periodic Table

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Across
  1. 2. this element is made up of atoms that have only one proton
  2. 3. this is the name of the group 7 elements
  3. 7. if an atom has seven protons, how many electrons will it have?
  4. 9. this is the name given to the group one metals
  5. 10. these are found on the right-hand side of the periodic table
  6. 15. this is the number of protons and neutrons in an atom
  7. 16. this subatomic particle has no charge
  8. 17. this is the number of protons in an atom
  9. 19. this element is made up of atoms that have 8 protons
  10. 21. this tells you how many shells an atom has
  11. 22. this is the mass of a proton
Down
  1. 1. this scientist put elements in order of their atomic weight
  2. 2. this is the name given to the group seven elements
  3. 4. the tiniest particle that makes up everything
  4. 5. this is the overall charge on an atom
  5. 6. these are found on the left-hand side of the periodic table
  6. 8. electrons orbit the nucleus in these
  7. 11. this subatomic particle has a negative charge
  8. 12. this subatomic particle has a positive charge
  9. 13. this is the mass of an electron
  10. 14. this is the name given to the central part of an atom
  11. 18. this is the overall charge on an atom
  12. 20. this is the group number that the alkali metals are found in