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It is a set of 4 nos. Which give a complete information about electron in an atom .i.e. its energy, shape, orientation and also its spin
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The three quantum numbers (n, l, and m) that describe an orbital are integers: 0, 1, 2, 3, and so on. The principal quantum number (n) cannot be zero. The allowed values of n are therefore 1, 2, 3,4, and so on. The angular quantum number (l) can be any integer between 0 and n - 1.
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