Beryllium has a nucleus composed of protons and neutrons. given the data, how many neutrons are in a typical beryllium nucleus? a) 3 b) 4 c) 5 d) 9

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

In science and physics what is the standard unit of measure for speed?

Three resistors are connected in series across a 15-v power supply. if the potential drops across resistors 1 and 2 are 4.1 volts and 3.1 volts, what is the exact potential drop (in volts) across resistor 3?