Question

which is the following set of quantum number is or are not correct for an electron in ground state electronic configuration of the elements of atomic number 30​

Answer 1

Answer:

Answer

The following set of quantum numbers is not possible for an electron in the ground state of an atom with atomic number 19. n=3,l=2,m=±2. It corresponds to 3d orbital. The electronic configuration of the atom is 1s  

2

2s  

2

2p  

6

3s  

2

3p  

6

4s  

1

 

Aufbau principle:

In the ground state of the atoms, the orbitals are filled with electrons in order of increasing energy.

The 4s sub-energy level is at lower energy than the 3d sub-energy level

For 3d, n=3 and l=2.  Hence, (n+l)=3+2=5

For 4s, n=4 and l=0.  Hence, (n+l)=4+0=4

As the value of (n+l) for 4s orbital is less than that of 3d orbital, 4s orbital is filled before 3d orbital.

Explanation: