Name two rare earths.

The name of 'rare earths' is used for

Give two terminal elements of rare earth elements series.

Answer the following : (a) Name of the element not known at time of Mendeleev. (b) Name any two typical elements. (c ) Name any two bridge elements. (d) Name two pairs showing diagonal relationship. (e) Name two transition elements. (f) Name two are rare earth elements. (g) Name two transuranic elements. (h) In which case compounds of Cr show maximum radius. (i) K_(2)CrO_(7) , (ii) CrO_(2)Cl_(2) , (iii) Cr_(2)(SO_(4))_(3) (iv) CrCl_(2)

Answer the following : (a) Name of the element not known at time of Mendeleev. (b) Name any two typical elements. (c ) Name any two bridge elements. (d) Name two pairs showing diagonal relationship. (e) Name two transition elements. (f) Name two are rare earth elements. (g) Name two transuranic elements. (h) In which case compounds of Cr show maximum radius. (i) K_(2)CrO_(7) , (ii) CrO_(2)Cl_(2) , (iii) Cr_(2)(SO_(4))_(3) (iv) CrCl_(2)

The first element of rare earth metals is

The first element of rare earth metals is

The total number of rare earth elements is

The name ‘Rare earths’ is used for

The term 'Rare earth's' and 'Rare gases' are used for