Atomic radii of Ti, Zn and Hf vary.

Compare atomic radii of Zr (Z = 40) and Hf (Z = 72).

Name the basic cause of similar atomic radii of Hf and Zr.

Name the basic cause of similar atomic radii of Hf and Zr.

(A): Zr and Hf have nearly equal atomic radii. (R): Zr and Hf belong to the same group.

In cubic ZnS (II-VI) compounds, if the radii of Zn and S atoms are 0.74 Å and 1.70 Å , the lattice parameter of cubic ZnS is

In cubic ZnS (II-VI) compounds, if the radii of Zn and S atoms are 0.74 Å and 1.70 Å , the lattice parameter of cubic ZnS is

In cubic ZnS (II-VI) compounds, if the radii of Zn and S atoms are 0.74 Å and 1.70 Å , the lattice parameter of cubic ZnS is

Ionic radii vary in