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In group 15 elements, there is considerable increase in covalent radius from N to P but small increase from As to Bi. Why ?

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asked Dec 18, 2017 in Chemistry by sforrest072 (157,439 points) ● 63 ● 448 ● 1284

In group 15 elements, there is considerable increase in covalent radius from N to P but small increase from As to Bi. Why ?

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answered Dec 18, 2017 by mdsamim (213,225 points) ● 5 ● 10 ● 22
selected Dec 18, 2017 by sforrest072
 
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[Hint : Due to completely filled d- and/or f-orbitals in As, Sb and Bi.]

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