Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति
JEE Main & Advanced
Chemistry
Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति
Question Bank
Ionisation Energy
question_answer
Highest ionisation energy stands for [DPMT 2000]
A)He
B)C
C)N
D)H
Correct Answer:
A
Solution :
He has highest ionisation energy due to it full fill 1s-orbital.