Q. Cathode rays are not simply rays but they are actually

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Q. Spectral lines of hydrogen atom which comes in IR region forms

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Q. Atomic spectrum is also produced by heating of elements in

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Q. After Bohr atomic model series of spectral line of hydrogen atom discovered was

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Q. Quantum theory was proposed in

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Q. Spectral lines for X-rays are divided into major groups which are

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Q. Quantum number is measure of size of electronic shell, which is

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Q. Glow in discharge tube disappears when pressure is

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Q. Electron is lighter than proton about

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Q. By help of Moseley law atomic number of

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Q. Elements were properly arranged in Mendeleev periodic table by

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Q. B' in Moseley equation is

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Q. In derivation of de Broglie equation wavelength depends upon

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Q. Neutron was discovered by

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Q. Level of energy of all three p-orbitals in absence of magnetic field is

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Q. Letter 'p' for azimuthal quantum number represents

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Q. Chamber used in Millikan oil drop method has

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Q. Radius of electron is inversely proportional to

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Q. Proton from paraffin can be expelled by

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Q. Vacuum permittivity is represented by

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