What is the electron configuration for Li, which has 3 electrons?
A) $1 s ^ { 2 } 2 s 1$
B) $1 s ^ { 2 } 1 p ^ { 1 }$
C) $1 s ^ { 1 } 2 s ^ { 2 }$
D) $1 s ^ { 1 } 2 s ^ { 1 } 3 s 1$
E) $1 s ^ { 3 }$

Question

Quizplus · Accepted Answer

The electron configuration for lithium (Li), which has 3 electrons, is $1s^2 2s^1$. This configuration fills the 1s orbital with 2 electrons and places the third electron in the 2s orbital.

What Is the Electron Configuration for Li, Which Has 3 1s22s11 s ^ { 2 } 2 s 11s22s1

What Is the Electron Configuration for Li, Which Has 3 $1 s ^ { 2 } 2 s 1$