The second ionisation potential of Li, Be, an | vedclass

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

Question

(B) The electronic configurations for the species formed after the first ionisation are:$Li^+: 1s^2$ (Stable noble gas configuration)$Be^+: 1s^2 2s^1$

Vedclass · Accepted Answer

$Li > B > Be$

Vedclass · Answer

(B) The electronic configurations for the species formed after the first ionisation are:$Li^+: 1s^2$ (Stable noble gas configuration)$Be^+: 1s^2 2s^1$$B^+: 1s^2 2s^2$ (Stable fully filled $2s$ subshell)To remove the second electron:For $Li^+$,we must remove an electron from the stable $1s^2$ shell,which requires very high energy.For $B^+$,we must remove an electron from the stable $2s^2$ subshell.For $Be^+$,we remove an electron from the $2s^1$ orbital,which is easier than removing from $B^+$.Therefore,the order of second ionisation potential is $Li > B > Be$.

The second ionisation potential of $Li, Be,$ and $B$ follows the order:

Similar Questions

Ionization energy increases in the order

How would you explain the fact that the first ionization enthalpy of sodium is lower than that of magnesium but its second ionization enthalpy is higher than that of magnesium?

Which of the following statements is incorrect?

Assertion $(A)$: Boron has a smaller first ionisation enthalpy than beryllium.
Reason $(R)$: The penetration of a $2s$-electron to the nucleus is more than the $2p$-electron; hence,the $2p$-electron is more shielded by the inner core of electrons than $2s$-electrons.

Which of the following sets has the highest sum of $IE$ values compared to all other sets mentioned?

Vedclass Test Series

Exam Paper Generator

Online Exam Module