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Question
Q369) The atomic number of an element having the valence shell electronic configuration 4s2 4p6 is ... [ PMPMT 1991]




SOLUTION

According to Aufbau : [Ne] 4s2, 3d10 4p6 total number of electrons=18+18=36
Number of electrons=number of protons
Atomic number=number of protons=36
Answer: (b)