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Which element has the electronic configuration ... - SS1 Chemistry Atomic Structure Question

Which element has the electronic configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2?

A

Iron (Fe)

 

B

Uranium (U)

 

C

Lead (Pb)

 

D

Radium (Ra)

correct option: b
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