The Most Important Reason That an Alpha Particle Can Be

Multiple Choice

The most important reason that an alpha particle can be stopped by a single sheet of paper while an electron of the same energy might not be stopped by hundreds of sheets of paper is that the alpha particle

A) Is a nucleus, while the electron is not.
B) Moves more slowly than the electron.
C) Interacts more strongly than the electron does.
D) Has greater mass than the electron.
E) Has more charge than the electron.