chemistry

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Across
  1. 3. The positively charged center of an atom that contains protons and neutrons
  2. 5. A positively charged particle. (+ electrical charge)
  3. 7. what does the word atom actualy mean
Down
  1. 1. A neutrally charged particle. (0 electrical charge)
  2. 2. A negatively charged particle. (- electrical charge)
  3. 4. The combined number of protons and neutrons found in the nucleus Measured in AMU.
  4. 6. where does the word atom originate from