Answer:
D. an orbital notation of the atom
Explanation:
Orbital notiation uses lines and arrows to show shells, subshells, and orbitals for electrons in an atom. Since it shows arrows being paired up in this diagram it would be the best model for Chuck to use.
A. electron, B. Nucleus
Proton is positive charge, electron is negative charge
proton weight, 1 AMU
C. the expansion of the universe is accelerating
S2F6, is the correct answer I believe!
Uranium fission is a property