What is the principal quantum number of the last shell for the element barium?
A)5
B)4
C)3
D)6
E)2

Name: What is the principal quantum number of the last shell for the element barium? A)5 B)4 C)3 D)6 E)2
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Question

Quizplus · Accepted Answer

The electron configuration of barium is [Xe] 6s2, indicating that the last shell is n=6. Therefore, the principal quantum number of the last shell for barium is 6, making choice D the correct answer.

What Is the Principal Quantum Number of the Last Shell