Two variables are directly proportional if their _ has a constant value. And why A. sun
B. product
C. quotient
D. difference

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

What term describes technology that operates on an atomic level

Heat is the total potential energy of a substance that can be transferred. true false