All About Atoms

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Across
  1. 2. a type of radiation that is stronger B
  2. 7. negative sub atomic particle in the shell of atom
  3. 9. a list of all known elements
  4. 10. a type of radiation that has high energy G
  5. 12. a name associated with the nucleus of an atom
  6. 13. the number of protons in an atom
  7. 14. sub atomic particle with no charge and in nucleus of atom
  8. 16. anything that takes up space and has mass
Down
  1. 1. mass of neutrons plus protons of an atom
  2. 3. the elements that are in the far right of periodic table
  3. 4. an atom with a different number of neutrons to protons which can make it unstable
  4. 5. positive sub atomic particle in the nucleus of atom
  5. 6. a pure substance containing only 1 type of atom
  6. 8. the smallest particle of matter
  7. 11. a type of radiation that is weak A
  8. 15. another name for the columns in the periodic table