periodic table

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Across
  1. 3. elements of group 17 are called _____
  2. 6. electronegativity ______ down the group.
  3. 9. i have 26 protons
  4. 11. electron affinity _____ across a period
  5. 13. architect of the modern periodic table
  6. 14. 7 horizontal rows in the periodic table
Down
  1. 1. across a period, atomic radius _______
  2. 2. the amount of energy required to remove a loosely bound electron from the outermost shell of an isolated gaseous atom is called _____ potential.
  3. 4. group 3 to 12 are called _____ elements
  4. 5. nuclear charge is the number of _____
  5. 7. highest ionisation potential
  6. 8. the scientist who arranged elements into groups of three called triads
  7. 10. 18 vertical groups in the modern periodic table
  8. 12. Least electronegative element