Si un elemento tienen Número atómico 25 y masa atómica 52. ¿Cuántos NEUTRONES posee el elemento?

You can still be friends with each other. you don't have to date since he likes someone else. just stick to being friends for now

The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.

Ithink it’s carbon dioxide