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(i) What are the quantum number by which...

(i) What are the quantum number by which an electron in an atom can be designated?
(ii) What is the maximum number of quantum numbers that may be the same for two electrons ofo an atom?

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(i) Principal quantum number (n), azimuthal quantum number (l), magnetic quantum number (m) and spin quantum number (s) are required to designate an electron in an atom.
(ii) The maximum number of quantum numbers that may be same for two electrons of an atom is 3.
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