I'm not sure but based on Aufbau's principle, should it be 3s2?

For that question, I got the answer as Mo (Molybdenum), and it was correct. I'm sure the 5s1 and 4d5 indicate the remaining electrons in the 5s and 4d orbitals, which match Molybdenum's electron configuration?

Quote from: Avni on December 11, 2024, 07:02:56 PMI'm not sure but based on Aufbau's principle, should it be 3s2?

Avni 
Remember half filled and fully filled configurations are more stable than partially filled.
Exceptional configurations of Cr family and copper family.

Quote from: Aditi on December 11, 2024, 09:38:49 PMFor that question, I got the answer as Mo (Molybdenum), and it was correct. I'm sure the 5s1 and 4d5 indicate the remaining electrons in the 5s and 4d orbitals, which match Molybdenum's electron configuration?

Aditi she is asking a different question here.Pl check my answer as mentioned above.

ohh okay

ooh, I remember now, thank you!