MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryPeriodic PropertiesModern Periodic Table
An atom has electronic configuration 1s2, 2s2, 2p6, 3s2, 3p6, 3d3, 4s2, you will place it in
A.fifth group✓ Correct
B.fifteenth group
C.second group
D.third group
Explanation
Given, the electronic configuration of an atom is 2 2 6 2 6 2 3 1s 2s 2p 3s 3p 4s 3d . The outermost shell contains 2 3 4s 3d , so the position of a given element is the fourth period and fifth (2 +3 =5) group. Therefore, the correct option is a.
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