What Is The Rest Mass Energy Of An Electron?

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Question

easy

Correct option is

0.51 MeV

The ratio of the wavelengths of the longest wavelength lines in the Lyman and Balmer series of hydrogen spectrum is

If a hydrogen atom at rest, emits a photon of wavelength , the recoil of the atom of mass m is given by

In an atom there are p photons, n neutrons and e electrons. For atoms of small mass, the relation between p, n and e is

Cal to protons ever attract each other?

How much energy is released when one amu is wholly converted into energy?

In the equation

The correct symbol for X is

The kinetic energy of a 300 K thermal neutron is

The energy released by the fission of one uranium atom is 200 MeV. The number of fissions per second required to produce 3.2 W of power is

The binding energy of deuteron is 1.15 MeV per nucleon and an alpha particle has a binding energy of 7.1 MeV per nucleon. Then in the reaction

the energy Q released is

Q10

After two hours of the initial amount of a certain radioactive isotope remains undecayed. The half life of the isotope is