Chapter 18 – Atoms and Nuclei
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The binding energy per nucleon for the parent nucleus is E1 and that for the daughter nuclei is E2. Then
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Nov
The binding energy per nucleon for the parent nucleus is E1 and that for the daughter nuclei is E2. Then The binding energy per nucleon for the parent nucleus is E1 and that for the daughter nuclei is E2. Then November 28, 2020 Category: Chapter 18 - Atoms and Nuclei , JEE Mains Physics 2002-2019 [...]
The half life of a radioactive substance is 20 minutes . The approximate time interval (t2−t1) between the time t2 when 2/3 of it had decayed and time t1 when 1/3 of it had decay is
28
Nov
The half life of a radioactive substance is 20 minutes . The approximate time interval (t2−t1) between the time t2 when 2/3 of it had decayed and time t1 when 1/3 of it had decay is The half life of a radioactive substance is 20 minutes . The approximate time interval (t2−t1) between the time [...]
Energy required for the electron excitation in Li^2+ from the first to the third Bohr orbit is
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Nov
Energy required for the electron excitation in Li^2+ from the first to the third Bohr orbit is Energy required for the electron excitation in Li^2+ from the first to the third Bohr orbit is November 28, 2020 Category: Chapter 18 - Atoms and Nuclei , JEE Mains Physics 2002-2019 Solved Video Solutions ,
After absorbing a slowly moving neutrons of mass mN (momentum ~0) a nucleus of mass M breaks into two nuclei of mass m1 and 5m1(6m1=M + mN), respectively . If the de-Broglie wavelength of the nucleus with mass m1 is λ, then de Broglie wavelength of the other nucleus will be
28
Nov
After absorbing a slowly moving neutrons of mass mN (momentum ~0) a nucleus of mass M breaks into two nuclei of mass m1 and 5m1(6m1=M + mN), respectively . If the de-Broglie wavelength of the nucleus with mass m1 is λ, then de Broglie wavelength of the other nucleus will be After absorbing a slowly [...]
Hydrogen atom is excited from ground state to another state with principal quantum number equal to 4. Then the number of spectral lines in the emission spectra will be.
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Nov
Hydrogen atom is excited from ground state to another state with principal quantum number equal to 4. Then the number of spectral lines in the emission spectra will be. Hydrogen atom is excited from ground state to another state with principal quantum number equal to 4. Then the number of spectral lines in the emission [...]
Hydrogen (1H^1), deuterium (1H^2) singly ionised helium (2He^4)+ and doubly ionised lithium (3Li^8)++ all have one electron around the nucleus. Consider an electron transition from n = 2 to n=1. If the wavelengths of emitted radiation are λ1,λ2,λ3 and λ4, respectively for four elements, then approximately which one of the following is correct?
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Nov
Hydrogen (1H^1), deuterium (1H^2) singly ionised helium (2He^4)+ and doubly ionised lithium (3Li^8)++ all have one electron around the nucleus. Consider an electron transition from n = 2 to n=1. If the wavelengths of emitted radiation are λ1,λ2,λ3 and λ4, respectively for four elements, then approximately which one of the following is correct? Hydrogen (1H1) [...]
As an electron makes a transition from an excited state to the ground state of a hydrogen- like atom/ion
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Nov
As an electron makes a transition from an excited state to the ground state of a hydrogen- like atom/ion As an electron makes a transition from an excited state to the ground state of a hydrogen- like atom/ion November 28, 2020 Category: Chapter 18 - Atoms and Nuclei , JEE Mains Physics 2002-2019 Solved Video [...]
Half-lives of two radioactive substances A and B are respectively 20 min and 40 min. Initially the samples of A and B have equal number of nuclei. After 80 min the ratio of remaining number of A and B nuclei is
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Nov
Half-lives of two radioactive substances A and B are respectively 20 min and 40 min. Initially the samples of A and B have equal number of nuclei. After 80 min the ratio of remaining number of A and B nuclei is Radiation com in g from transitions n = 2 to n = 1 of [...]
A radioactive nucleus A with a half-life T, decays into a nucleus B. At t=0, there is no nucleus B. After sometime t, the ratio of the number of B to that of A is 0.3. Then, t is given by :
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Nov
A radioactive nucleus A with a half-life T, decays into a nucleus B. At t=0, there is no nucleus B. After sometime t, the ratio of the number of B to that of A is 0.3. Then, t is given by : A radioactive nucleus A with a half-life T decays into a nucleus B. [...]
Some energy levels of a molecule are shown in the fig. The ratio of the wavelengths r=λ1/λ2, is given by
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Nov
Some energy levels of a molecule are shown in the fig. The ratio of the wavelengths r=λ1/λ2, is given by is given by Some energy levels of a molecule are shown in the fig. The ratio of the wavelengths r=λ1/λ2 November 28, 2020 Category: Chapter 18 - Atoms and Nuclei , JEE Mains Physics 2002-2019 [...]