What element has its 7 valence electrons in energy level 4 in s and p orbitals?

The answer to your question is the element (Br) because it has 35 in his atomic number.
 1s2/2s2 2p6/ 3s2 3p6/4s2 4p6 3d9. or [Ar] 4s2 2p5 3d10.
i hope that is answering your question.

Sink to the bottom. addition of potassium nitrate past it’s dissolution capacity at a particular temperature will cause the extra to just sink to the bottom of the glass.however, if you were to raise the temperature of the solution prior to dissolving it, and then slowly decrease the temperature after the dissolution, you would create a “supersaturated” solution - a solution that has more solute dissolved into it than should be allowed. if you add any extra solute past this, the entire solution would “crystallize,” and this is how you get those cool videos on youtube.

The answer is sucrose.