Question

why is second ionization enthalpy of bismuth greater than antimomy
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Answer 1

Answer:

There is a very small increase in size from Sb to Bi due to completely filled f- orbitals in Bi. As we know that after removing one electron the size of cation further decreases. This decrease is higher for Bi as compare antimony. ... Therefore higher 2nd and 3rd ionization energies for Bi.

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