An atom has 17 electrons and its mass is 35, calculate the following number of protons, atomic numbers, numbers of neutrons

How does central place theory explain patterns in the size and distribution of cities?

All of the following came out of china and were exchanged along the silk road, except a. papermaking b. block printing c. buddhism d. compasses select the best answer from the choices provided a b c d

Identify the youngest layer in the figure ( have to click one letter)