Which of the following order of atomic radius is not wrong
$Sc < Y \approx La$
$K < Rb \approx Cs$
$Ge < Sn > Pb$
$Ni < Pd \approx Pt$
Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionization enthalpy
Magnetic moment of $x^{n+}$ is $\sqrt {24} $ $B.M.$ Hence No. of unpaired electron and value of $'n'$ respectively. (Atomic number $= 26$)
Which one of the following is paramagnetic
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?
Mercury is a liquid at $0\,^o C$ because of