For the second period elements,the correct in | vedclass

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

Question

(B) The first ionisation enthalpy generally increases across a period due to an increase in effective nuclear charge. However,there are deviations due

Vedclass · Accepted Answer

$Li < B < Be < C < O < N < F < Ne$

Vedclass · Answer

(B) The first ionisation enthalpy generally increases across a period due to an increase in effective nuclear charge. However,there are deviations due to stable electronic configurations. The electronic configurations for second period elements are: $Li (2s^1)$,$Be (2s^2)$,$B (2s^2 2p^1)$,$C (2s^2 2p^2)$,$N (2s^2 2p^3)$,$O (2s^2 2p^4)$,$F (2s^2 2p^5)$,$Ne (2s^2 2p^6)$. $Be$ has a fully filled $2s$ orbital,making its ionisation energy higher than $B$. $N$ has a half-filled $2p$ subshell,making its ionisation energy higher than $O$. The correct order is: $Li < B < Be < C < O < N < F < Ne$.

For the second period elements,the correct increasing order of first ionisation enthalpy is:

Similar Questions

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

Which element has the maximum first ionization potential?

Which is the correct order of the first ionization potential of $N$,$O$,and $C$?

In which of the following arrangements is the order not correct according to the property indicated against it?

When first ionisation energy is plotted against the atomic number,the peaks in the curve are occupied by

Vedclass Test Series

Exam Paper Generator

Online Exam Module