Question

If the spin of electron is zero, then what is the effective charge?

Answer 1

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The electron spin magnetic moment is important in the spin-orbit interaction which splits atomic energy levels and gives rise to fine structure in the spectra of atoms. The electron spin magnetic moment is also a factor in the interaction of atoms with external magnetic fields (Zeeman effect).



The three quantum numbers (n, l, and m) that describe an orbital are integers: 0, 1, 2, 3. The principal quantum number (n) cannot be zero. The allowed values of n are therefore 1, 2, 3, 4... The angular quantum number (l) can be any integer between 0 and n - 1



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Answer 2

This means that if energy is released when a atom is added to a atom, therefore ∆E is negative, the electron affinity will be positive. Likewise, if energy is required to add an electron to an atom, therefore ∆E is positive, then electron affinity will be negative.