Spin Quantum Number

Q. Which set of quantum numbers is not possible?

1. n = 1, l = 0, $m_l$ = 0, $m_s$ = 0
2. n = 1, l = 0, $m_l$ = 0, $m_s$ = + 1/2
3. n = 2, l = 1, $m_l$ = 1, $m_s$ = + 1/2
4. n = 1, l = 0, $m_l$ = 0, $m_s$ = + 1/2

Q.

Which of the following sets of quantum numbers represent electrons in a hydrogen atom?

1. $1,1,0,+1/2$

2. $1,0,0,+1/2$

3. $3,0,0,-1/2$

4. $4,2,1,-1/2$

Q. The two electrons of K shell differ in ____ quantum number.

1. principal
2. angular momentum
3. spin
4. magnetic

Q. The spin quantum number is denoted by ________.

1. $\text{n}$
2. $\text{l}$
3. ${\text{m}}_{\text{s}}$
4. ${\text{m}}_{\text{l}}$

Q. Which of the following represents the set of quantum numbers for the last electron filled in beryllium?

1. n = 1, l = 0, $m_l$ = 0, $m_s$ = 0
2. n = 1, l = 1, $m_l$ = + 1, $m_s$ = + 1/2
3. n = 2, l = 0, $m_l$ = 0, $m_s$ = - 1/2
4. n = 2, l = 1, $m_l$ = 0, $m_s$ = 0

Q. The number of spin orientations possible for an electron in an orbital is ______.

1. five
2. two
3. four
4. three

Q.

The number of values possible for the spin quantum number is:

1. 1

2. 2

3. 3

4. 4

Q.

For a given value of $\mathcal{l}$, the total number of ‘m’ values is ________.

Q.

Which of the following is the correct cause of stability of completely filled and half-filled sub-shells?

1. It is because of the symmetrical distribution of electrons

2. It is because of relatively small shielding

3. It is because of larger exchange energy

4. It is because of smaller coulombic repulsion energy.

Q. In helium (${\text{1s}}^2$), if the spin quantum number of one electron is (${\text{m}}_{\text{s}}$) = -1/2, then the spin quantum number of the other electron would be ___.

1. 0
2. 1
3. -1/2
4. +1/2

Q. Which of the following is the electronic configuration of Mg?

1. 
2. 
3. 
4. 

Q. magnetic quantum number ?

Q. Spin of electrons are represented by:

1. +1 and -1
2. + 1/2 and - 3/2
3. + 1/2 and - 1/2
4. + 3/2 and - 3/2

Q. The two electrons present in an orbital have opposite spin.

1. False
2. True