Electron Spin Questions

The electron spin is described as the electron spinning around its axis. Electron spin indicates electrons’ quantum property and is a form of angular momentum. An electron spin s = 1/2 is an intrinsic property of electrons.

The electron can spin in two directions:

• Spin up
• Spin down

Read more: Electron spin.

Important Electron Spin Questions with Answers

1. What are the inherent properties of the electrons?

The inherent properties of the electrons are mass, a charge of the electron, and electron spin.

2. The formula to find the spin quantum number is _____.

1. S=n+2
2. S=n-2
3. S=n/2
4. S=2n

Answer: c) S=n/2

Explanation: The spin quantum number is given by the formula S=n/2.

3. The letter that represents the electron spin is ______.

1. e
2. s
3. t
4. h

Answer: b) s

Explanation: ‘s’ is the letter that represents the electron spin.

4. Who recommended that an electron has an inherent angular momentum known as spin?

In 1925, S. A. Goutsmit and G.E. Uhlenbeck recommended that an electron has an inherent angular momentum known as spin.

5. The intrinsic angular momentum of the electron is signified by quantum number ______.

1. 0
2. 1
3. -1
4. ½

Answer: d) ½

Explanation: The electron’s intrinsic angular momentum is signified by quantum number ½.

6. State true or false: The spin quantum number is the fourth number.

1. TRUE
2. FALSE

Answer: a) TRUE

Explanation: Yes, the spin quantum number is the fourth number.

7. List the four quantum numbers.

The four quantum numbers are azimuthal quantum number, magnetic quantum number, principal quantum number, and spin quantum numbers.

8. Azimuthal quantum number is denoted by the letter _______.

1. e
2. s
3. l
4. h

Answer: c) l

Explanation: Azimuthal quantum number is denoted by the letter ‘l’.

9. The set of numbers used to describe the position and energy of the electron in an atom is known as ______.

1. Super numbers
2. Quantum numbers
3. Atom numbers
4. Set numbers

Answer: b) Quantum numbers

Explanation: Quantum numbers are used to describe the position and energy of the electron in an atom.

10. The spin up corresponds to the spin in the direction ______.

1. 0
2. -z
3. +z
4. None of the options

Answer: c) +z

Explanation: The spin up and spin down directions correspond to the spinning in the +z or –z directions, respectively.

Practice Questions

1. What is a quantum number?
2. What is spin down?
3. What are the types of quantum numbers?
4. Explain magnetic quantum number.
5. Define the principal quantum number.