Atomic Structure

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Across
  1. 2. neutral subatomic particle
  2. 4. part of an atom containing neutrons and protons
  3. 7. positive subatomic particle
  4. 10. has 40 electrons in a neutral atom
  5. 12. number which represents the identity of the atom, can be found on the periodic table.
  6. 14. Sulfur-16 has _______ neutrons
  7. 15. Smallest unit of matter which has characteristics of an element
  8. 16. has 7 protons
Down
  1. 1. Amount of an isotope that exists
  2. 3. _____ particles make up an atom
  3. 5. has 6 protons
  4. 6. Atoms which are the same element but have different masses
  5. 8. has an atomic mass of 28.086 amu
  6. 9. Atomic mass on periodic table is an __ of all the isotopes' mass
  7. 11. protons + neutrons
  8. 13. negative subatomic particle