Atoms questions
233 published questions with worked solutions.
- A hydrogen atom moves with a velocity u and makes a head-on inelastic collision with another stationary hydrogen atom. Both atoms...
- A beam of monochromatic light of wavelength ejects photoelectrons from a cesium surface ( =1.9 eV) which are made to collide with...
- Transitions between three energy levels in a particular atom give rise to three spectral lines of wavelengths, in increasing...
- If the average life time of an excited state of hydrogen is of the order of 10^ -6 s estimate how may orbits an electron makes,...
- In Rutherford's -particle experiment with thin gold foil. 8100 scintillations per minute are observed at an angle of 60^ . The...
- In Rutherford experiment, a 5.3 MeV -particle moves towards the gold nucleus (Z = 79). How close does the -particle get to the...
- In a Rutherford scattering experiment when a projectile of charge Z_1 and mass M_1 approaches a target nucleus of charge Z_2 and...
- In the Bohr's model of a hydrogen atom, the centripetal force is furnished by the coulomb attraction between the proton and the...
- An electron jumps from the first excited state to the ground state of hydrogen atom. What will be the percentage change in the...
- In hydrogen atom, an electron jumps from bigger orbit to smaller orbit, so that radius of smaller orbit is one-fourth of radius...
- The radius of the smallest electron orbit in hydrogen like ion is 0.51 10^ -10 /4 m, then it is
- The potential energy of the orbital electron in the ground state of hydrogen atom is -E, what is the kinetic energy?
- In an inelastic collision, an electron excites a hydrogen atom from its ground state to a M-shell state. A second electron...
- The ionisation energy of the electron in the hydrogen atom in its ground state is 13.6 eV. The atoms are excited to higher energy...
- A hydrogen atom is in excited state of principal quantum number n. It emits a photon of wavelength , when returns to ground...
- If the electron in the hydrogen atom jumps from third orbit to second orbit, the wavelength of the emitted radiation in term of...
- What is the wavelength of light for the least energetic photon emitted in the Lyman series of the hydrogen spectrum? (Take, hc =...
- Consider the spectral line resulting from the transition from n=2 to n=1, in atoms and ions given below. The shortest wavelength...
- The energy of an electron in excited hydrogen atom is -3.4 eV. Then, according to Bohr's theory, the angular momentum of the...
- The ratio of minimum wavelengths of Lyman and Balmer series will be
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