Chapter 2 – Atomic Structure
The electron energy in hydrogen atom is given by En=(−2.18×10^−8)/n2J. Calculate the energy required to remove an electron completely from the n=2 orbit. What is the longest wavelength of light in cm that can be used to cause this transition?
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Nov
The electron energy in hydrogen atom is given by En=(−2.18×10^−8)/n2J. Calculate the energy required to remove an electron completely from the n=2 orbit. What is the longest wavelength of light in cm that can be used to cause this transition? What is the number of photons of light with wavelength 4000 pm which provide 1 [...]
What is the energy in joules required to shift the electron of the hydrogen atom from the first Bohr orbit to the fifth Bohr orbit ? And what is the wavelength of the light emitted when the electron returns to the ground state ? The ground state electron energy is −218×10^−11 erg.
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Nov
What is the energy in joules required to shift the electron of the hydrogen atom from the first Bohr orbit to the fifth Bohr orbit ? And what is the wavelength of the light emitted when the electron returns to the ground state ? The ground state electron energy is −218×10^−11 erg. What is the [...]
Calculate the wave number for the longest wavelength transition in the Balmer series of atomic hydrogen.
12
Nov
Calculate the wave number for the longest wavelength transition in the Balmer series of atomic hydrogen. Calculate the wave number for the longest wavelength transition in the Balmer series of atomic hydrogen. November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class 11 ,
What is the maximum number of emission lines when the excited electron of a H atom in n = 6 drops to the ground state?
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Nov
What is the maximum number of emission lines when the excited electron of a H atom in n = 6 drops to the ground state? What is the maximum number of emission lines when the excited electron of a H atom in n = 6 drops to the ground state? November 12, 2020 Category: Chapter [...]
How much energy is required to ionise a H – atom if the electron occupies n=5 orbit ? Compare your answer with the ionization energy of H-atom (energy required to remove the electron from n=1 orbit ).
12
Nov
How much energy is required to ionise a H – atom if the electron occupies n=5 orbit ? Compare your answer with the ionization energy of H-atom (energy required to remove the electron from n=1 orbit ). How much energy is required to ionise a H - atom if the electron occupies n=5 orbit ? [...]
What is the wavelength of light emitted when the electron in a hydrogen atom undergoes transition from an energy level with n = 4 to an energy level with n = 2? What is the colour corresponding to this wavelength ?
12
Nov
What is the wavelength of light emitted when the electron in a hydrogen atom undergoes transition from an energy level with n = 4 to an energy level with n = 2? What is the colour corresponding to this wavelength ? What is the number of photons of light with wavelength 4000 pm which provide [...]
Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 Å . Calculate threshold frequency (v0) and work function (W0) of the metal.
12
Nov
Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 Å . Calculate threshold frequency (v0) and work function (W0) of the metal. Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 Å . Calculate threshold [...]
A 25 watt bulb emits monochromatic yellow light of wavelength of 0.57μ m. Calculate the rate of emission of quanta per second .
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Nov
A 25 watt bulb emits monochromatic yellow light of wavelength of 0.57μ m. Calculate the rate of emission of quanta per second . A 25 watt bulb emits monochromatic yellow light of wavelength of 0.57μ m. Calculate the rate of emission of quanta per second . November 12, 2020 Category: Chapter 2 - Atomic Structure [...]
An Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize a sodium atom .Calculate the ionization energy of sodium in KJ mol^−1.
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Nov
An Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize a sodium atom .Calculate the ionization energy of sodium in KJ mol^−1. An Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize a sodium atom .Calculate the ionization energy of sodium in KJ mol^−1. November 12, 2020 Category: Chapter 2 - [...]
A photon of wavelength 4×10^−7m strikes on metal surface , the work function of the metal being 2.13 eV Calculate : (i) the energy of the photon (ev) (ii) the kinetic energy of the emission and the velocity of the photoelectron (1eV=1,6020×10^−19J),
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Nov
A photon of wavelength 4×10^−7m strikes on metal surface , the work function of the metal being 2.13 eV Calculate : (i) the energy of the photon (ev) (ii) the kinetic energy of the emission and the velocity of the photoelectron (1eV=1,6020×10^−19J), 6020×10^−19J) A photon of wavelength 4×10^−7m strikes on metal surface the work function [...]