Question

Choose the wrong statement about the spin of an electron, according to quantum mechanics:

• A. it is related to intrinsic angular momentum
• B. spin is rotation of electron about its own axis
• C. value of spin quantum number must not be 1
• D. +1/2 value of spin quantum number represents up spin

Answer 1

Answer: (B)

spin is rotation of electron about its own axis

According to quantum mechanics spin of an electron is related to intrinsic angular momentum, the value of spin quantum number must not be 1 because it is $-\frac{1}{2}$ and +$\frac{1}{2}$ value of spin represents up spin.

Spin is a purely quantum mechanical phenomenon without any analogue in classical physics. Spin is not associated with any rotating internal parts of elementary particles; it is intrinsic to the particle itself.

Hence, the correct option is $B$