Chapter 12 – Atoms

A photon collides with a stationary hydrogen atom in ground state inelastically . Energy of the colliding photon is 10.2eV. After a time interval of order of micro second another photon collides with same hydrogen atom inelastically with an energy of 15eV what will be observed by the detector? The shortest wavelength of Lyman series [...]

The electric potential between a proton and as electron is given by V=V0ln(r)/r0 , where r0 is a constant . Assuming Bohr’s model to be applicable , write variation of rn with n, n being the principal quantum number ? n being the principal quantum number ? The electric potential between a proton and as [...]

The M.I. of a diatomic molecule is I. what is its rotational energy in the nth orbit , (where n ≠ 0) if Bohr’s quantization condition is used ? (where n ≠ 0) if Bohr's quantization condition is used ? The M.I. of a diatomic molecule is I. what is its rotational energy in the [...]

In which energy state of doubly ionized lithium (Li++) has the same energy as that of the ground state of hydrogen? In which energy state of doubly ionized lithium (Li++) has the same energy as that of the ground state of hydrogen? June 7, 2021 Category: Chapter 12 - Atoms , MTG NEET Physics , [...]

In a Geiger- Marsden experiment, calculate the distance of closest approach to the nucleus of Z=80, when an α particle of 8 Me V energy impinges on it before it comes momentarily to rest and reverses its direction. calculate the distance of closest approach to the nucleus of Z=80 In a Geiger-Marsden experiment when an [...]

An electron, in a hydrogen like atom , is in excited state. It has a total energy of -3.4 eV, Calculate (i) the kinetic energy and (ii) the de-Broglie wavelength of the electron. An electron Calculate (i) the kinetic energy and (ii) the de-Broglie wavelength of the electron. In a hydrogen-like atom is in excited [...]

The magnitude of angular momentum, orbit radius and frequency of revolution of electron in hydrogen atom corresponding to quantum number n are L, r and v respectively. Then according to Bohr’s theory of hydrogen atom, the term constant for all orbits is orbit radius and frequency of revolution of electron in hydrogen atom corresponding to [...]

What is the wavelength of light for the least energetic photon emitted in the Lyman series of the hydrogen spectrum ? (take hc=1240eVnm) What is the wavelength of light for the least energetic photon emitted in the Lyman series of the hydrogen spectrum ? (take hc=1240eVnm) June 7, 2021 Category: Chapter 12 - Atoms , [...]

Energy of an electron in the lowest energy state of the hydrogen atom is 13.6eV . Find the energy needed to remove an electron from the fourth orbit. Energy of an electron in the lowest energy state of the hydrogen atom is 13.6eV . Find the energy needed to remove an electron from the fourth [...]

The distance of closest approach of an α -particle fired towards a nucleus with momentum p, is r. If the momentum of the a-particle is 2p, the corresponding distance of closest approach is is r. If the momentum of the a-particle is 2p the corresponding distance of closest approach is The distance of closest approach [...]