Chapter 2 – Atomic Structure (Level 1 and Level 2)
Sahay Sir > Question Answers > N Awasthi Physical Chemistry > Chapter 2 - Atomic Structure (Level 1 and Level 2)
If the lowest energy X-rays have λ = 3.055 × 10^−8 m, estimate the minimum difference in energy between two Bohr’s orbits such that an electronic transition would correspond to the emission of an X-ray. Assuming that the electrons in other shells exert no influence, at what Z(minimum) would a transition from a second energy level to the first result in the emission of an X-ray?
10
Nov
If the lowest energy X-rays have λ = 3.055 × 10^−8 m, estimate the minimum difference in energy between two Bohr’s orbits such that an electronic transition would correspond to the emission of an X-ray. Assuming that the electrons in other shells exert no influence, at what Z(minimum) would a transition from a second energy [...]
H-atom is exposed to electromagnetic radiation of λ=1025.6 A˚ and excited atom gives out induced radiations. What is the minimum wavelength of these induced radiations?
10
Nov
H-atom is exposed to electromagnetic radiation of λ=1025.6 A˚ and excited atom gives out induced radiations. What is the minimum wavelength of these induced radiations? H-atom is exposed to electromagnetic radiation of λ=1025.6 A˚ and excited atom gives out induced radiations. What is the minimum wavelength of these induced radiations? November 10, 2020 Category: Chapter [...]
A hydrogen like species (atomic number Z) is present in a higher excited state of quantum number n. This excited atom can make a transition to the first excited state by successive emission of two photons of energies 10.20eV and 17.0eV respectively. Alternatively, the atom from the same excited state can make a transition to the second excited state by successive emission of two photons of energy 4.25eV and 5.95eV respectively. Determine the value of Z.
10
Nov
A hydrogen like species (atomic number Z) is present in a higher excited state of quantum number n. This excited atom can make a transition to the first excited state by successive emission of two photons of energies 10.20eV and 17.0eV respectively. Alternatively, the atom from the same excited state can make a transition to [...]
In a measurement of quantum efficiency of photosynthesis in green plants, it was found that 10 quanta of red light of wavelength 6850 Å were needed to release one molecule of O2. The average energy storage in this process for 1 mole O2 evolved is 112 Kcal. What is the energy conversion efficiency in this experiment? Given: 1 cal =4.18 J, NA = 6 × 1023,h = 6.63 × 10^−34 J.s
10
Nov
In a measurement of quantum efficiency of photosynthesis in green plants, it was found that 10 quanta of red light of wavelength 6850 Å were needed to release one molecule of O2. The average energy storage in this process for 1 mole O2 evolved is 112 Kcal. What is the energy conversion efficiency in this [...]
An electron, in a hydrogen atom, in its ground state absorbs 1.5 times as much energy as the minimum required for its escape from the atom. What is the velocity of the emitted electron ?
10
Nov
An electron, in a hydrogen atom, in its ground state absorbs 1.5 times as much energy as the minimum required for its escape from the atom. What is the velocity of the emitted electron ? An electron In a hydrogen atom in its ground state absorbs 1.5 times as much energy as the minimum required [...]
Calculate the minimum and maximum number of electrons which may have magnetic quantum number m=+1 and spin quantum number s=−1/2 in chromium (Cr)
10
Nov
Calculate the minimum and maximum number of electrons which may have magnetic quantum number m=+1 and spin quantum number s=−1/2 in chromium (Cr) Calculate the minimum and maximum number of electrons which may have magnetic quantum number m=+1 and spin quantum number s=−1/2 in chromium (Cr) November 10, 2020 Category: Chapter 2 - Atomic Structure [...]
The energy of a I,II and III energy levels of a certain atom are E, 3/4E and 2E respectively. A photon of wavelength λ is emitted during a transition from III to I. What will be the wavelength of emission for transition II to I?
10
Nov
The energy of a I,II and III energy levels of a certain atom are E, 3/4E and 2E respectively. A photon of wavelength λ is emitted during a transition from III to I. What will be the wavelength of emission for transition II to I? 3/4E and 2E respectively. A photon of wavelength λ is [...]
Monochromatic radiation of specific wavelength is incident on H-atoms in the ground state. H-atoms absorb energy and emit subsequently radiations of six different wavelengths. Find the wavelength of incident radiations:
10
Nov
Monochromatic radiation of specific wavelength is incident on H-atoms in the ground state. H-atoms absorb energy and emit subsequently radiations of six different wavelengths. Find the wavelength of incident radiations: For a 3s−orbital value of v is given by following relation: ψ(3s)= 9 root3/1 ( a0/1)^3/2 (6−6σ+σ^2 )e −σ/2 ;whereσ = 3a0/2r.Z What is [...]
For a 3s−orbital value of v is given by following relation: ψ(3s)= 9 root3/1 ( a0/1)^3/2 (6−6σ+σ^2 )e −σ/2 ;whereσ = 3a0/2r.Z What is the maximum radial distance of the node from the nucleus?
10
Nov
For a 3s−orbital value of v is given by following relation: ψ(3s)= 9 root3/1 ( a0/1)^3/2 (6−6σ+σ^2 )e −σ/2 ;whereσ = 3a0/2r.Z What is the maximum radial distance of the node from the nucleus? For a 3s−orbital value of v is given by following relation: ψ(3s)= 9 root3/1 ( a0/1)^3/2 (6−6σ+σ^2 )e −σ/2 ;whereσ [...]
At which temperature will the translational kinetic energy of H-atom equal to that for H-atom of first line Lyman transition? (Given NA =6×10^23 )
10
Nov
At which temperature will the translational kinetic energy of H-atom equal to that for H-atom of first line Lyman transition? (Given NA =6×10^23 ) At which temperature will the translational kinetic energy of H-atom equal to that for H-atom of first line Lyman transition? (Given NA =6×10^23 ) November 10, 2020 Category: Chapter 2 - [...]