wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

What is the correct order of second-order ionization energy?


A

C>N>O>F

No worries! We‘ve got your back. Try BYJU‘S free classes today!
B

O>N>F>C

No worries! We‘ve got your back. Try BYJU‘S free classes today!
C

O>F>N>C

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D

F>O>N>C

No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C

O>F>N>C


The explanation of the correct answer:

  • The effective nuclear charge increases as the period progress because valence electrons cannot effectively screen the charge. This results in an increase in ionization potential.
  • The second ionization potential of Oxygen is higher than that of Fluorine. As a result of the first ionization, oxygen acquires a stable half-filled configuration.
  • Therefore, the Oxygen electron must be removed from 2p3 sub-shell for the second ionization. While in the case of Fluorine, it is being expelled from the 2p4 subshell.

The explanation of the incorrect answer:

Option (a):

  • The ionization energy decreases as the period's order of the periodic table moves from the right to the left direction.

Option (b):

  • The 2p sub-shell of Nitrogen is not completely filled so it requires less energy as compared to the Fluorine.

Option (d):

  • Fluorine has not a stable electronic configuration so it requires less ionization energy as compared to Oxygen.

Hence, the correct option is (c).


flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Higher Elements, Oxidation State
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon