He identified the alpha particle as a helium atom and used it in postulating the existence of the atomic nucleus.

Cute.

Are you postulating a hollow body? Like a donut?

It's not really possible for real objects.

Briefly, the scientific method essentially involves postulating a theory, and then that theory will either stand or fall on the evidence of future experiments.

Briefly, the scientific method essentially involves postulating a theory, and then that theory will either stand or fall on the evidence of future experiments.

Named for the famous chemist Ernest Rutherford who improved on the "plum pudding" model of the atom by postulating a nucleus which contained most of the atom's mass.