1.

Identify the atomic number of the element which possess same number of electrons in L and M shells.A. 18B. 19C. 16D. 18

Answer» Correct Answer - 2
`{:("Atomic number (Z) ","Electronic configuration"),(" "19," "2_(,)8_(,)8_(,)1),(" "20," "2_(,)8_(,)8_(,)2):}`


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