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Which element has six energy levels?

A) rubidium (Rb)

B) cesium (Cs)

C) potassium (K)

D) sodium (Na)

2 Answers

4 votes
Answer:    B) cesium (Cs)
User Adrian Pascu
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2 votes
The energy level is the electron cloud number and only Cesium is large enough to have electrons in its sixth shell. Thus,
the answer is B.
User Finomnis
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