Which is the most abundant carbon isotope?

What is the atomic number of an element?

How much more mass does a proton have compared to an electron?

What two subatomic particles make up the nucleus?

What is on the outside of any atom?

Why don_t atoms just pass through one another?

What is an atom mostly made of?

Did Rutherford actually see the atomic nucleus?

Did most alpha particles pass through the gold foil or bounce back backwards?

Are alpha particles positive or negative in charge?