An Ibuprofen (MW = 206.29) solution was made by dissolving 5,588 milligrams into water with a final volume of 0.155 L. What is the concentration of Ibuprofen in Molarity?

Abbreviated as mg-25.

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.

High-energy and unstable.