The total number of electrons in a subshell designated by azimuthal quantum number, l is given as
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NEET Practice Questions (MCQs) with Answers & Solutions
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According to Bohr’s model of the atom, an electron can revolve around the atomic nucleus in a suitable orbit without emitting energy if its orbit
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Explanation
According to Bohr's model, an electron can revolve around the nucleus in a stable orbit without emitting energy if the orbit houses a whole number of de Broglie waves. This condition is known as the quantization of angular momentum.
According to Somerfield’s model, only circular orbit is possible for the electron in
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Explanation
According to Sommerfeld's modification of Bohr's atomic model, only circular orbits are possible for electrons in the K shell. For higher shells (L, M, N, etc.), elliptical orbits are also allowed.
According to Bohr’s atomic model
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The transition of electrons inH atom that will emit maximum energy is
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The limiting line in Balmer series will have a frequency of
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The wavelength of a spectral line for electron transition is inversely related to
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Explanation
The wavelength of a spectral line is inversely proportional to the energy difference between the initial and final energy levels involved in the electron transition. It is independent of the nuclear charge, electron velocity, and the number of electrons undergoing the transition.
The phenomenon of splitting of spectral lines under the influence of the electric field is known as
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Explanation
The Stark effect is the splitting or shifting of spectral lines of atoms or molecules due to the presence of an external electric field. It is named after Johannes Stark, who discovered this phenomenon in 1913.
If the energy of electron in H atom is given by expression, $ {- 1312 \over n^2 } kJ mol ^ {-1} $ , then the energy n2 required to excite the electron from ground state to second orbit is
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In the atomic spectrum of hydrogen, the spectral lines pertaining to electronic transition of n =4 to n =2 refers to
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Explanation
In the atomic spectrum of hydrogen, the Balmer series corresponds to the electronic transitions from higher energy levels (n ≥ 3) to the second energy level (n=2). Therefore, the spectral lines pertaining to the transition from n=4 to n=2 belong to the Balmer series.
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