Embibe Experts Solutions for Chapter: Classification of Elements and Periodicity in Properties, Exercise 2: EXERCISE-I (Conceptual Questions)

The decreasing order of size of ions is :-

In which compound hydrogen is electronegative:-

Among the elements $\mathrm{Ca},\mathrm{Mg},\mathrm{P}$ and $\mathrm{Cl}$, the order of increasing atomic.radii is:-

The correct order of the decreasing ionic radii among the following isoelectronic species are:

Which is the correct order of ${\mathrm{IP}}_1$?

Identify the wrong statement in the following:

The $1^{\text{st }}$ Ionisation enthalpy of $\mathrm{Na}, \mathrm{Mg}$ and $\mathrm{Si}$ are $496, 737, 776 \mathrm{kJ} {\mathrm{mol}}^{-1}$, respectively then what will be the $1^{\text{st }}$ ionisation enthalpy of $\mathrm{Al}$ in $\mathrm{kJ} {\mathrm{mol}}^{-1}$:

Be²⁺ is isoelectronic with which of the following ions?