<P> Four quantum numbers can describe an electron in an atom completely . As per the following model, these nearly - compatible quantum numbers are: </P> <Ul> <Li> Principal quantum number (n) </Li> <Li> Azimuthal quantum number (l) </Li> <Li> Magnetic quantum number (m) </Li> <Li> Spin quantum number (s) </Li> </Ul> <Li> Principal quantum number (n) </Li> <Li> Azimuthal quantum number (l) </Li>

N is known as the what quantum number