Calculate the oxidation number of the underlined element in
(a) `ulVO_2^(+)` (b) `ulUO_2^(2+)` (c) `Ba_2ul(Xe)O_6` (d) `K_4ulP_2O_7` (e) `ulK_2ulS`

Explanation

(a) `ulVO_2^+" "x+2(-2)=+1" or"x=+5`
(b) `ulUO_2^(2+)" "x+2(-2)=+2" or "x=+6`
(c) `Ba_2ulXeO_6" "+2(2)+x+6(-2)=0" or "x=+8`
(d) `K_4ulP_2O_7" "1xx4+2x+7(-2)=0 " or "x=+5`
(e) `ulK_2S " "1xx2+x=0 " or "x=-2`