Embibe Experts Solutions for Chapter: Classification of Elements and Periodicity in Properties, Exercise 4: Exercise 4

Which of the following does not represent the correct order of the properties indicated?

${\mathrm{H}}^{+}$ ion always get associated with other atoms or molecules. This is because

Which one of the following ions has the highest value of ionic radius?

The stability of dihalides of $\mathrm{Si}, \mathrm{Ge}, \mathrm{Sn}$ and $\mathrm{Pb}$ increases steadily in the sequence.

The correct sequence which shows decreasing order of the ionic radii of the elements is:

The outer electronic configuration of $\mathrm{Gd}$ is:

The increasing order of the ionic radii of the given isoelectronic species is:

The first ionisation potential of $\mathrm{Na}$ is $5.1\mathrm{eV}$. The value of electron gain enthalpy of ${\mathrm{Na}}^{+}$ will be: