Periodic Table

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Across
  1. 3. Element in the same ___ are more chemically similar.
  2. 4. When we move from the bottom to the top of the periodic table, the electronegativity increase and ionisation energy ___.
  3. 5. Attraction between valence electron and the nucleus become ___ due to increasing shielding effect.(variation in the first IE down the group)
Down
  1. 1. On moving across period 3, the first ionisation energy of the elements ___.
  2. 2. A group elements react similarly because of the ___ electron.
  3. 6. In the modern periodic table elements are arranged by ___.