What is the number of unpaired electrons present in ground state of Silicon and Chromium, respectively ?

Step-by-step solution

The atomic number of Silicon (Si) is 14 . The electronic configuration of Si is 1s² 2s² 2p⁶ 3s² 3p² . In the 3p subshell, there are 2 electrons which occupy separate orbitals according to Hund's rule. Thus, Si has 2 unpaired electrons. The atomic number of Chromium (Cr) is 24 . The electronic configuration of Cr is [Ar] 3d⁵ 4s¹ . In the 3d subshell, there are 5 unpaired electrons and in the 4s subshell, there is 1 unpaired electron. Thus, Cr has 6 unpaired electrons. The number of unpaired electrons in Si and Cr ar