cos you do, you got a problem, eh!
A theory. Its the Atom Theory. The old theory used to be that an atom was just like a billiard ball.
Bohr atom
the structure of the atom
The Rutherford theory of the atom was correct; but after 100 years, of course, this theory was strongly developped, new experiments added and the today theory of the atom is more complex and detailed.
an atom
what is atom
no
When you split a atom, you will get quarks, when you split a quark, the theory is that you will get little strings of energy (take a look at the string theory)
he came up with the theory of the atom
Quantom theory
discovered electrons
Bohr