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Subject: Science , asked on 1/3/15

# give reason:lithium atom is smaller than sodium atomcl (atomic no 17)is more electronegative than sulphur (at no 16)

The number of shells increases as we go down the periodic table. As the number of shells increases, the atomic radius of the elements also increases .
Therefore lithium is smaller than sodium.
The property of electro negativity increases as we go across the periodic table. Hence Cl is more electronegative .
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