IMPORTANCE OF ISOTOPES (AMELIA)

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Across
  1. 4. a version of an element
  2. 5. is a isotope of hydrogen tieh 2 neutrons and one proton
  3. 8. it has 1 proton and 1 neutron, is another isotope of hydrogen
  4. 9. a big star that is the center of our galaxy
Down
  1. 1. an isotope of hydrogen with only one proton
  2. 2. any basic substance that is used in or produced by a reaction involving changes to atoms or molecules
  3. 3. it is the smallest part of matter
  4. 6. also called chemical change or chemical phenomenon
  5. 7. is an element that is used to inflate ballons that can go away