julia vance week 6 vocab

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Across
  1. 2. a substance that cannot be separated or broke down
  2. 6. the smallest unit of an element that maintains the pro
  3. 7. number the number of protons in the nucleus of an atom
  4. 8. in chemistry, a column in the periodic table
Down
  1. 1. is a horizontal row of the periodic table
  2. 3. in nuclear physics, the sum of the numbers
  3. 4. a subatomic particle that has no charge
  4. 5. a subatomic particle that has a negative charge
  5. 9. a subatomic particle that has a positive charge