Q. Element which has [Ar]4s2 electronic configuration is

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Q. Detector used in Rutherford experiment is

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Q. Thickness of gold foil is

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Q. Relative charge which is present on proton is

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Q. Wavelength 550nm-600nm shows

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Q. Instrument to measure e/m value of electron was discovered in

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Q. Angular momentum of orbit is actually integral multiple of

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Q. Value of Z for hydrogen atom is actually

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Q. Explanation of dual nature of matter experiment was designed by

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Q. A' in Moseley equation is

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Q. If any two sub shells have same (n+l) values, then that sub shell is placed first whose n value is

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Q. N+l value of 5s orbital is

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Q. Orbital motion was described in elliptical form by

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Q. Diffraction is a property of

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Q. Mass of neutron in amu is

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Q. Radioactive copper is used in treatment of

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Q. Azimuthal quantum number has

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Q. Number of electrons in outer most shell of alkali metals are

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Q. Third orbit of hydrogen atom is far from first orbit at about

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Q. Work was done on wave theories by

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