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Sahay Sir > Question Answers > JEE Adv and Mains Chemistry 41 Years Solved Video Solutions 1979 - 2019 > Chemistry > Chapter 2 - Atomic Structure > Energy of an electron is given by E = −2.178 × 10^18 J( n^2 /Z^2 ). Wavelength of light required to excite an electron in an hydrogen atom from level n=1 to n=2 will be: (h = 6.62 × 10^−34 Js and c = 3.0 × 10^8 ms^−1 )

Energy of an electron is given by E = −2.178 × 10^18 J( n^2 /Z^2 ). Wavelength of light required to excite an electron in an hydrogen atom from level n=1 to n=2 will be: (h = 6.62 × 10^−34 Js and c = 3.0 × 10^8 ms^−1 )

Among the following the energy of 2s orbital is lowest in: