What is the correct ground state electron configuration of boron, which has 5 electrons?
A) $1 s ^ { 2 } 2 p ^ { 3 }$
B) $1 s ^ { 2 } 1 p ^ { 2 } 2 s$
C) $1 s ^ { 2 } 2 p ^ { 2 } 3 s$
D) $1 s ^ { 2 } 2 s ^ { 2 } 2 p$
E) $1 s ^ { 2 } 2 s ^ { 2 } 2 p ^ { 3 }$

Question

Quizplus · Accepted Answer

The correct ground state electron configuration for boron, which has 5 electrons, is $1 s ^ { 2 } 2 s ^ { 2 } 2 p ^ { 1 }$. This configuration fills the lowest energy levels first (1s, then 2s) before placing an electron in the 2p orbital.

What Is the Correct Ground State Electron Configuration of Boron 1s22p31 s ^ { 2 } 2 p ^ { 3 }1s22p3

What Is the Correct Ground State Electron Configuration of Boron $1 s ^ { 2 } 2 p ^ { 3 }$