The electron enters into 4s orbital after filling 3p orbital but not i

1.	The electron enters into 4s orbital after filling 3p orbital but not into 3d. Explain the reason.
Answer» 1. Based on (n+l) values energy value of 3d orbitals is 3 + 2 = 5, energy value of 4s orbitals is 4 + 0 = 4 2. The energy level of 4s orbital is less than the 3d orbital according to the Aufbau principle electron enters into lower energy orbital first. 3. Thats why electrons enters into 4s orbital after filling 3p, but not into 3d.

The electron enters into 4s orbital after filling 3p orbital but not into 3d. Explain the reason.

Answer»

1. Based on (n+l) values energy value of 3d orbitals is 3 + 2 = 5, energy value of 4s orbitals is 4 + 0 = 4

2. The energy level of 4s orbital is less than the 3d orbital according to the Aufbau principle electron enters into lower energy orbital first.

3. Thats why electrons enters into 4s orbital after filling 3p, but not into 3d.