Notifications
Clear all
0
01/10/2020 4:30 pm
Topic starter
Assertion: First ionization energy for nitrogen is lower than oxygen.
Reason: Across a period effective nuclear charge decreases.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect.
(d) If both the Assertion and Reason are incorrect.
1 Answer
0
01/10/2020 4:35 pm
(d) If both the Assertion and Reason are incorrect.
Explanation:
The ionisation energy of N is more than that of O because N has exactly half filled valence p orbital.
7N 1s2 2s2p3 8O1s22s2p4
The nuclear charge increases across a period.