Of the waves listed, the one with the longest wavelength is a(n)
a. x ray.
b. radio wave.
c. microwave.
d. visible light wave.

Of the waves listed, the one with the longest wavelength is the radio wave. The answer is letter B. They are the longest wave in the electromagnetic spectrum. It can either be a long wave or a short wave.

to treat tumors in the body

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge