The d- and f- B...

Which one of the following ion exhibits colour in aqueous solution ?      

The Lanthanoid contraction refers to:

The radius of $$La^{3+}$$ (atomic number of La $$=$$ 57) is 1.06A. Which one of the following given values will be closest to the radius of $$Lu^{3+}$$? (atomic number of Lu=71)

Which of the following elements belongs to actinide series?

The atomic and ionic radii (M$$^{3+}$$ ions) of Lanthanide elements decrease with increase in atomic number. This effect is called: 

The ion which shows maximum paramagnetic character among the bivalent ions of the first transition metal series is :

Which of the following lanthanide is commonly used ?

The first and last elements of actinides are:

The highest magnetic moment is shown by the transition metal with the configuration:

5f series elements are known as_______