1. Tardigrade
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  3. Chemistry
  4. Elements of group-15 form compounds in +5 oxidation state. However, bismuth forms only one well characterised compound in +5 oxidation state. The compound is

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Q. Elements of group-$15$ form compounds in $+5$ oxidation state. However, bismuth forms only one well characterised compound in $+5$ oxidation state. The compound is

The p-Block Elements - Part2

Solution:

The stability of $+5$ oxidation state decreases down the group due to inert pair effect. The only well characterised $Bi(V)$ compound is $BiF_5$ as fluorine being most electronegative element is able to unpair $ns$ electrons.