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0. The electronic configuration of the atom of an element 'X' is (n - 2)S2 (n - 1 )S2 (n - 1 )p6 ns2np5. If n = 3 the element 'X' is placed in Modern Periodic Table (NTSE Andhra Pradesh, Stage-I, 2014-15)
7th group, 3rd period
17th group, 3rd period
17th group, 5th period
3rd group, 3rd period
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