Embibe Experts Solutions for Chapter: Classification of Elements and Periodicity in Properties, Exercise 1: Level 1

Values of ${\mathrm{IE}}_1, {\mathrm{IE}}_2, {\mathrm{IE}}_3$ of an element are $9.3, 18.2$ and $553.8\mathrm{eV}.$ Predict group number in Modern Periodic Table.

Which of the following element has the maximum, first ionisation potential?

Fluorine is more electronegative than nitrogen. The best explanation is that

The first ionisation enthalpies for three elements are $1314, 1680$ and $2080 \mathrm{kJ} {\mathrm{mol}}^{-1}$, respectively. The correct sequence of the elements is:

The electronic configuration of an element with the largest difference between the $1^{\mathrm{st}}$ and $2^{\mathrm{nd}}$ ionization energies is:

How many of the following radius orders are incorrect?

(a) ${\mathrm{N}}^{3-}>{\mathrm{P}}^{3-}$
(b) ${\mathrm{O}}^{2-}>{\mathrm{F}}^{-}$
(c) ${\mathrm{Ca}}^{2+}>{\mathrm{Sr}}^{2+}$
(d) ${\mathrm{S}}^{-}>{\mathrm{S}}^{2-}$
(e) ${\mathrm{S}}^{2-}>{\mathrm{O}}^{-}$

Report atomic number of the element having the largest size among the following:

$\mathrm{Ni}, \mathrm{Cu}, \mathrm{Zn}$

The Lanthanoids are characterized by the uniform $\left[+\mathrm{n}\right]$ oxidation state shown by all the Lanthanoids. What is the value of $\text{'}\mathrm{n}\text{'}.$