Question: 100% NCERT covered from Particular Keyword.Explanations are 100% from NCERT | [Difficult level: Easy] From NCERT NEET Derived Question.
Answer: c
Hydrogen 1 1H , Deuterium 2 1H , singly ionised Helium 4 2He and doubly ionised lithium 6 3 Li all have one electron around the nucleus. Consider an electron transition from n = 2 to n = 1. If the wavelengths of emitted radiation are 1, 2 , 3 and 4 respectively then approximately which one of the following is correct?
