Which element is bigger in size, lithium (Z = 3) or Sodium (Z = 11) and why?

Discussion in 'CBSE Class 10 Chemistry Help' started by phani, Jan 13, 2012.

  1. phani

    phani Member Staff Member

    Which element is bigger in size, lithium (Z = 3) or Sodium (Z = 11) and why?
    Lithium (Li) atom has only two shells K and L in it whereas a sodium (Na) atom has three shells K L and M. Since a sodium atom has one mote shell than a lithium atom, therefore sodium atom is bigger in size.

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