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

The order of electron gain enthalpy (magnitude) of $\mathrm{O}, \mathrm{S}$ and $\mathrm{Se}$ is:

Electronic configurations of four elements $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$ are given below:

(i) $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^6$

(ii) $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^4$

(iii) $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^1$

(iv) $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^5$

Which of the following is the correct order of increasing tendency to gain electron:

Which of the following statement is correct?

Which of the following is affected by the stable electron configuration of an atom?

(a) Electronegativity

(b) lonisation enthalpy

(c) Electron gain enthalpy

Correct answer is:

The electronegativity values of $\mathrm{C}, \mathrm{N}, \mathrm{O}$ and $\mathrm{F}$ on Pauling scale:

Correct order of electronegativity of $\mathrm{N}, \mathrm{P}, \mathrm{C}$ and $\mathrm{Si}$ on Pauling scale is:

The correct order of electronegativity on Pauling scale is:

Which of the following is most electronegative element?