Give the charge and full ground-state electronconfiguration of the monatomic ion

Question

Give the charge and full ground-state electronconfiguration of the monatomic ion most likely to be formed by theelement.

Rb



a. Rb+:1s22s22p63s23p64s23d104p6

b. Rb+:1s22s22p63s23p64s23d104p65s2

c. Rb+:1s22s22p63s23p64s23d104p5

d. none of these

e. Rb+:1s22s22p63s23p64s23d104p65s1 Answer is A but can someoneplease give a good explanation. Thanks Give the charge and full ground-state electronconfiguration of the monatomic ion most likely to be formed by theelement.

Rb



a. Rb+:1s22s22p63s23p64s23d104p6

b. Rb+:1s22s22p63s23p64s23d104p65s2

c. Rb+:1s22s22p63s23p64s23d104p5

d. none of these

e. Rb+:1s22s22p63s23p64s23d104p65s1 Answer is A but can someoneplease give a good explanation. Thanks Answer is A but can someoneplease give a good explanation. Thanks

Explanation / Answer

When Rb becomes positive by losing an electron that removes it backone step to the electron configuration of Kr.

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