Periodic Table

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Across
  1. 2. Mass Combine Protons and Neutrons to get
  2. 4. The elements in Groups 3 through 12
  3. 5. electron Determines chimical reactivity
  4. 9. the identifier of an element
  5. 10. Energy levels detemine an elements placement
  6. 11. The first 3 elements in group 16 are
Down
  1. 1. Number Is the number of protons in an element
  2. 3. the 2nd and 3rd element in group 14 is a
  3. 6. In a neutral atom it is the same amount as protons
  4. 7. Determined by the number of valance electrons in an element
  5. 8. element with 5 protons and 3 valance electrons