Atoms and Periodic Table

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Across
  1. 4. The amount of subatomic particles found in an atoms (number)
  2. 5. The element with the atomic number 6
  3. 7. Element with atomic mass 30.974
  4. 8. Found by subtracting protons from atomic mass
  5. 11. The element with the atomic number 8, essential for breathing
  6. 12. A substance made of only one type of atoms
Down
  1. 1. Negatively charged particle that orbits the nucleus
  2. 2. Element with the symbol K, also found in Bananas and helps with muscle function
  3. 3. Electrons are found in the electron _____
  4. 5. This metal is used to make coins and has the symbol Cu
  5. 6. The amount of neutrons that Al has (aluminum)
  6. 9. Where the protons and neutrons are found in an atom
  7. 10. The number of protons in an element's nucleus determines its atomic _