$\operatorname{Zr}\,(\mathrm{Z}=40)$ and $\mathrm{Hf}\,(\mathrm{Z}=72)$ have similar atomic and ionic radii because of :
belonging to same group
diagonal relationship
lanthanoid contraction
having similar chemical properties
Which of the following is correct
In the ground state of cobalt atom $(Z = 27)$ there are ....... unpaired electrons and thus the atom is.......
Which of the following pairs of elements cannot form an alloy
A compound of a metal ion $M^{x+}$ $(Z = 24)$ has a spin only magnetic moment of $\sqrt {15}$ Bohr Magnetons. The number of unpaired electrons in the compound are
Chloride of which of the following elements will be coloured