25 sugar because the mass should be equal on both sides
I believe the answer is density
Answer:
In general, atomic radius decreases across a period and increases down a group. ... Down a group, the number of energy levels (n) increases, so there is a greater distance between the nucleus and the outermost orbital. This results in a larger atomic radius.
The first option: the basic unit of the nervous system
Answer:
I think the answer should be B. Number of valence electrons
