## Answers

You got 2 protons instead of 1 - thus it is like H except the potential well is 2x that of H

so energy levels are 2x more than H

in your 1s1 10s1 case

as as far the 10s1 electron is concerned it is way beyond the cloud of the 1s1 - so it sees

2 protons that are almost 100% shielded by 1 electron (the 1s1 one) thus it sees a potential (at n=10) like that of hydrogen.

because there is some (real small) probability of 10s1 being in the face of the 1s1 electron the shielding is not always 100% for all radii and the energylevel is slightly shifted wrt the H case.

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