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Among the following pairs of orbitals wh...

Among the following pairs of orbitals which orbital will experience the larger effective nuclear charge? (i) 2s and 3s, (ii) 4d and 4f, (iii) 3d and 3p

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a. `2s` is closer to the nucleus than `3s`. Hence `2s` will experience larger effective nuclear charge.
b. `4d`
c. `3p` (for same reasons)
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