Atomic Theory

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Across
  1. 3. atoms with the same number of protons and diffrent numbers of neutrons
  2. 5. positively charged particle
  3. 8. the number of protons in the nucleus of an atom
  4. 9. The basic paricle from which all elements are made
Down
  1. 1. An idea that has been studied and investigated and is supported by a vast and diverse of evidence
  2. 2. The sum of protons and neutrons in the nucleus of an atom
  3. 4. atoms that contain negatively charged particle
  4. 6. particle exists un the nucleus of atoms
  5. 7. dense center is called