The number of electrons in the outer energy level of a neutral atom of boron (atomic number 5)is ________.
A)2
B)3
C)5
D)8
E)10

Question

Quizplus · Accepted Answer

Boron has an atomic number of 5, meaning it has 5 electrons total. The electron configuration of boron is 1s²2s²2p¹, meaning it has 2 electrons in its first energy level and 3 electrons in its second energy level. The outermost energy level is the second energy level, so boron has 3 electrons in its outer energy level.

The Number of Electrons in the Outer Energy Level of a Neutral