Periodic Table

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Across
  1. 2. Horizontal rows in a periodic table
  2. 6. elements in group 17 are called as
  3. 7. Scientist who made group of 3 element called as triads
  4. 8. Tendency to gain electron
  5. 10. Series of Radioactive elements is called
Down
  1. 1. Element with highest electronegativity
  2. 3. What happen to the atomic size as we go down a group
  3. 4. elements of group 18 are called
  4. 5. Element with lowest electronegativity
  5. 9. Element from group 16 period 2