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Isotones have same
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The interrelationship between matter and energy was given by
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Electronic configuration of is
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When the electron is excited from K level to M level we get
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The fundamental particle that has least mass is
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The atomic number of an element having the valence shell electronic configuration is
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rays are a stream of
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Wave number is defined as
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The number of neutrons in the deuterium atom 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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In the case of atomic spectrum of hydrogen which series of lines lie in the visible region?
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For a given energy level the number of orbitals is equal to
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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 number of unpaired electrons in a chromic ion (atomic number 24) 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 charge on an atom of is
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The correct set of quantum numbers for the impaired electron of fluorine atom is
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The ion that is isoelectronic with CO is
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No two electrons in an atom can have the same values of all four quantum numbers according to
C. Pauli's exclusion principle
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Which of the following has the highest mass?
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The corect set of quantum numbers for the impaired electron of fluorine atom is
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The size of nucleus is
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The possible values of l for an s orbital are
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The number of unpaired electrons in fluorine atoms is/are
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Charge on fundamental particle neutrino is
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Which of the following atoms has a non-spherical outermost orbital.
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Mass of positron is the same to that of
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Which elements is represented by the following electronic configuration?
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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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The orbitals with maximum number of possible orientation is: