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rays are a stream of
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The angular momentum of the moving electron is equal to
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In Lyman series an electron jumps from higher energy level to
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The number of unpaired electrons in fluorine atoms is/are
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The corect set of quantum numbers for the impaired electron of fluorine atom is
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For a given energy level the number of orbitals is equal to
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A dipositive ion has in the K shell, 8 e~ s in the L shell and in the M shell. Atomic number of Z is
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The ion that is isoelectronic with CO is
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The atomic number of an element having the valence shell electronic configuration is
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The correct set of quantum numbers for the impaired electron of fluorine atom is
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Electronic configuration of is
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The charge on an atom of is
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In the nucleus of there are
A. 40 protons and 20 electrons
B. 20 protons and 40 electrons
C. 20 protons and 40 neutrons
D. 20 protons and 20 neutrons
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Which of the following weighs the least?
B. 2 litres of at N.T.P.
C. molecules of
D. atoms of carbon
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Charge on an electron was shown by
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The wavelength of an electron moving with a velocity
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Which elements is represented by the following electronic configuration?
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The number of neutrons in the deuterium atom is
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Isotones have same
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The fundamental particle that has least mass is
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In an atom of hydrogen, which of the following orbitais has the lowest energy for an electron present in it?
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The atomic structure of an atom of an element is Is . The element is
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The orbitals with maximum number of possible orientation is:
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The wavelength of an electron
A. is equal to that of light
B. remains constant with velocity
C. decreases with an increasing velocity
D. increases with an decreasing velocity
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Charge on fundamental particle neutrino is
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Davisson and Germer gave an experimental evidence for
A. wave nature of electron
B. particle nature of electron
C. particle nature of light
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The interrelationship between matter and energy was given by
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Argon is isoelectronic with
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Which of the following has the highest mass?
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The velocity of a photon is
A. dependent on its wavelength
B. dependent on its source
C. equal to cube of its amplitude
D. independent of its wavelength