How many protons and neutrons are in Cl-37?
A20 protons, 17 neutrons
B17 protons, 37 neutrons
C17 protons, 20 neutrons
D37 protons, 17 neutrons
A20 protons, 17 neutrons
B17 protons, 37 neutrons
C17 protons, 20 neutrons
D37 protons, 17 neutrons