How many valence electrons are present in the element with the following ground state electron configuration? 1s² 2s² 2p¹ A)1 B)2 C)3 D)4

Question

Quizplus · Accepted Answer

To determine the number of valence electrons, we look at the outermost energy level (in this case, the 2nd energy level) and count the electrons in the s and p orbitals. There are 2 electrons in the 2s orbital and 1 electron in the 2p orbital, giving a total of 3 valence electrons.

How Many Valence Electrons Are Present in the Element with the Following