Which of the following are isoelectronic and isostructural? 1) $$NO^{-}_{3}$$, $$C
Acute angle between the curves y=cos2x and y= 2siny2x at a comm
An urn contains $$6$$ white and $$4$$ black balls. A fair die whose faces are numbered from $$1$$
Arrange Ce+3, La+3, Pm+3 and Yb+3 in increa
