Magnetic moment of $x^{n+}$ is $\sqrt {24} $ $B.M.$ Hence No. of unpaired electron and value of $'n'$ respectively. (Atomic number $= 26$)
$4 , 3$
$3 , 5$
$4 , 2$
$4 , 1$
Why the transition elements are hard and have high melting and boiling points?
In the series $\operatorname{Sc}(Z=21)$ to $\operatorname{Zn}(Z=30)$, the enthalpy of atomisation of zinc is the lowest, i.e.. $126\, kJ\, mol ^{-1}$. Why?
Correct statement for $3d-$ series is
The trivalent ion having largest size in following is
All the following statements about the transitional elements are true except that