Embibe Experts Solutions for Chapter: Classification of Elements and Periodicity in Properties, Exercise 1: AP EAPCET Medical 2021 (6-Sep Forenoon)

Which of the following species is iso-electronic with $\mathrm{Cr}?$

An element of atomic number $118$ would be a/an __________

The correct order for the increasing ionization enthalpies for the following is:

$\left(\mathrm{i}\right) 1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^2$
$\left(\mathrm{ii}\right) 1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^1$
$\left(\mathrm{iii}\right) 1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^6$
$\left(\mathrm{iv}\right) 1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^2$
$\left(\mathrm{v}\right) 1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^1$

Which among the following structures does not correctly represent the bonding capacities (valancies) of the atoms involved ?

Which among the following property increases, as we move down group-I of the periodic table ?

Identify the correct order with respect to first ionization energies of the given elements:

Ionization energy of nitrogen is more than that of oxygen because of _________

The correct order of decreasing first ionization is ________