Question

The minimum bond angle in hydrides of group 16 elements is in

Answer 1

The minimum bond angle in hydrides of group 16 elements is in 109.{ 5 }^{ 0 }.  

Group IV elements are C, Si, Ge, Sn, and Pb.  

The "valence shell" "electronic configuration" is ${ ns }^{ 2 }{ np }^{ 2 }$ All of the Group IV hydrides will have perfect tetrahedral geometry due to having four bonds to the "same atom" and "no lone pairs" on the "central atom".  

$Thus\quad C{ H }_{ 4 },\quad Si{ H }_{ 4 },\quad Ge{ H }_{ 4 },\quad Sn{ H }_{ 4 },\quad and\quad Pb{ H }_{ 4 }\quad all\quad have\quad bond\quad angles\quad of\quad 109.5^{o}$