Periodic Table Trends

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Across
  1. 11. The electrons on the outer energy level
  2. 12. The charge of an electron
  3. 14. The energy needed to remove a valence electron from an outer shell
  4. 16. Represents the number of energy levels an atom has
Down
  1. 1. The charge of a proton
  2. 2. The charge of a neutron
  3. 3. He discovered electrons
  4. 4. A measure of how much an atom want to gain valence electrons to complete a full shell
  5. 5. When properties of an element change in a predictable way
  6. 6. Calcium will lose 2 valence electrons in order to become stable
  7. 7. The charge an atom has when either losing or gaining valence electrons
  8. 8. Aluminum will lose 3 valence electrons and become this
  9. 9. A measure of the amount of energy released when a neutral atom gains a valence electron to form a negative ion
  10. 10. This trend increases down a group and to the left across a row
  11. 13. Bromine will gain 1 valence electron and become this
  12. 15. He discovered the atom