What is the correct electron arrangement for the lithium atom?
A)3
B)3,1
C)1,2
D)2,1
E)2,5

Question

Quizplus · Accepted Answer

Lithium has 3 electrons. The first energy level can hold 2 electrons and the second energy level can hold 8 electrons. Lithium's electron configuration is 1s2 2s1, which indicates that it has 2 electrons in the first energy level and 1 electron in the second energy level. Therefore, the correct electron arrangement for lithium is 2,1.

What Is the Correct Electron Arrangement for the Lithium Atom