Atoms

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Across
  1. 2. the radiation that starts with a b
  2. 3. _____ life of an isotope or atom
  3. 5. The number in the top right corner of an element
  4. 8. Who said atoms were made of indivisibles
  5. 9. A positive charged thing in an atom
  6. 12. the things in the periodic table
Down
  1. 1. a ray that gives off radiation
  2. 4. Basic building block of life
  3. 6. The same element with a different amounts of neutrons
  4. 7. a negatively charged thing in an atom
  5. 10. A neutral charged thing in an atom
  6. 11. The radiation that starts with an a