PLZ ANSWER FAST. I NEED THIS ASAP Which phrase describes a valence electron?

A. Any negatively charged particle in a atom
B. an electron in the outer energy level of an atom
C. an electron that has been removed from an atom
D. an electron is the innermost orbit of an atom

Change in speed or direction : )

Heat is involved in chemical change in two ways; chemical changes either result in heat being added to or removed from an object, and chemical changes require a certain amount of heat before they can take place.

The correct answer is weight.

The question is incomplete. complete question is attached belowanswer: correct answer is option b  i.e.  solid particles  reason: filter paper has small pores, through which smaller particles can pass through. however, solid particles  have relatively larger size. hence, they are least likely to pass through.