Pls help me will give brainliest. Where is convection happening on Earth?

A. Atmosphere

B. Earth's outer core

C. Earth's mantle

D. Oceans

E. All of the above I

In chemistry, the type of an atom (what element it is) is determined by: a) the number of protons it contains in its nucleus. b) the number of neutrons it contains in its nucleus. c) the number of protons it has in a cloud around the nucleus. d) the number of neutrons it has in a cloud around the nucleus. e) the number of electrons it exchanges with its neighbors.