Atoms questions
233 published questions with worked solutions.
- The momentum of an electron revolving in n^ th orbit is given by : (Symbols have their usual meanings)
- In the hydrogen spectrum, be the wavelength of first transition line of Lyman series. The wavelength difference will be "a " the...
- A free electron of 2.6 eV energy collides with a H^+ion. This results in the formation of a hydrogen atom in the first excited...
- A light of energy 12.75 eV is incident on a hydrogen atom in its ground state. The atom absorbs the radiation and reaches to one...
- Experimentally it is found that 12.8 eV energy of required to separate a hydrogen atom into a proton and an electron. So the...
- The wavelength of the first spectral line in the Balmer series of hydrogen atom is 6561 Å. The wavelength of the second spectral...
- If _ Cu is the wavelength of K_ X-ray line of copper (atomic number 29) and _ Mo is the wavelength of the K_ X-ray line of...
- Highly excited states for hydrogen-like atoms (also called Rydberg states) with nuclear charge Ze are defined by their principal...
- A free hydrogen atom after absorbing a photon of wavelength _a gets excited from the state n=1 to the state n=4. Immediately...
- If the potential difference applied to an X-ray tube is doubled while keeping the separation between the filament and the target...
- The wavelength of X-rays is of the order of
- Which one of the following statements about X-rays is not true ?
- Which one of the following wavelength radiations may correspond to an X-ray ?
- A particle of mass m moves in circular orbits with potential energy V(r) = Fr, where F is a positive constant and r is its...
- In an X-ray tube, electrons emitted from a filament (cathode) carrying current I hit a target (anode) at a distance d from the...
- A Hydrogen-like atom has atomic number Z. Photons emitted in the electronic transitions from level n = 4 to level n = 3 in these...
- A metal target with atomic number Z = 46 is bombarded with a high energy electron beam. The emission of X-rays from the target is...
- A hydrogen atom in its ground state absorbs 10.2 eV of energy. The angular momentum of electron of the hydrogen atom will...
- d _ 1 and d _ 2 are the impact parameters corresponding to scattering angles 60° and 90° respectively, when an particle is...
- The waves emitted when a metal target is bombarded with high energy electrons are
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