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
Extended or long form of periodic table
question_answer
The elements with atomic number 10, 18, 36, 54 and 86 are all [CPMT 1976]
A)Light metals
B)Inert gases
C)Halogens
D)Rare-earths
Correct Answer:
B
Solution :
Inert gases, these have \[n{{s}^{2}}n{{p}^{6}}\] configuration.