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# An atom has electronic configuration An atom has electronic configuration $1s^ 2$ $2s^2$ $2p^6$ $3s^2$ $3p^6$ $3d^3$ $4s^2$ , you will place it in which group ?

( A ) Fifth
( B ) Fifteenth
( C ) Third
( D ) Second

Electronic configuration $1s^ 2$ $2s^2$ $2p^6$ $3s^2$ $3p^6$ $3d^3$ $4s^2$