The electron configuration of an atom is 1s² 2s² 2p³.The number of unpaired electrons in this atom is A)1 B)2 C)3 D)4

Question

Quizplus · Accepted Answer

To determine the number of unpaired electrons, we need to look at the electron configuration and identify the electrons that occupy different orbitals with the same spin. In this case, we see that there is one unpaired electron in the 2p orbital (the P1 electron) and two unpaired electrons in the 3S orbital (the two S1 electrons). Therefore, the total number of unpaired electrons is 3, which corresponds to choice C.

The Electron Configuration of an Atom Is 1s2 2s2 2p3

The Electron Configuration of an Atom Is 1s² 2s² 2p³