Identify the elements X and Y using the ionis | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) For element $X$,the jump from $IE_1$ $(495 \ kJ/mol)$ to $IE_2$ $(4563 \ kJ/mol)$ is very large,indicating that the second electron is removed fro

Vedclass · Accepted Answer

$X=Na, Y=Mg$

Vedclass · Answer

(A) For element $X$,the jump from $IE_1$ $(495 \ kJ/mol)$ to $IE_2$ $(4563 \ kJ/mol)$ is very large,indicating that the second electron is removed from a stable noble gas core. This corresponds to $Na$ $([Ne] 3s^1)$.For element $Y$,the values $IE_1$ $(731 \ kJ/mol)$ and $IE_2$ $(1450 \ kJ/mol)$ are relatively close,which is characteristic of an alkaline earth metal like $Mg$ $([Ne] 3s^2)$,where both valence electrons are removed easily compared to the third electron.Therefore,$X=Na$ and $Y=Mg$.

Element	Ionization energy $1^{st}$ $(kJ/mol)$	Ionization energy $2^{nd}$ $(kJ/mol)$
$X$	$495$	$4563$
$Y$	$731$	$1450$

Identify the elements $X$ and $Y$ using the ionisation energy values given below :

Element Ionization energy $1^{st}$ $(kJ/mol)$ Ionization energy $2^{nd}$ $(kJ/mol)$

$X$ $495$ $4563$

$Y$ $731$ $1450$

Similar Questions

The electronic configurations of elements $A, B$ and $C$ are $[He] 2s^1$,$[Ne] 3s^1$ and $[Ar] 4s^1$ respectively. Which one of the following orders is correct for the first ionization potentials (in $kJ \ mol^{-1}$) of $A, B$ and $C$?

Which of the following elements has the highest second ionisation potential?

Elements $X, Y$ and $Z$ have atomic numbers $19, 37$ and $55$ respectively. Which of the following statements is true about them?

Consider the elements $Ne$,$Na$,and $Mg$. The element with the highest first ionization enthalpy and the element with the lowest second ionization enthalpy,respectively,are:

As one moves along a given row in the periodic table,ionization energy

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Identify the elements $X$ and $Y$ using the ionisation energy values given below : Element Ionization energy $1^{st}$ $(kJ/mol)$ Ionization energy $2^{nd}$ $(kJ/mol)$ $X$ $495$ $4563$ $Y$ $731$ $1450$