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Among the following pairs of orbital whi...

Among the following pairs of orbital which orbital will experience the larger effective nuclear charge?
a. `2s and 3s`, b. `4d and 4f`, c. `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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