$\alpha$-particles are aimed at a metal foil. Most of the particles pass through the foil with very little deflection. A small fraction of the particles are scattered back at large angles. What does this evidence show about the structure of an atom?
- AIt consists of a charged centre much smaller than the size of the atom and with little of the mass of the atom.
- BIt consists of a negative charge the size of the atom containing small positive charges scattered through it.
- CIt consists of a charged centre much smaller than the size of the atom but with most of the mass of the atom.
- DIt consists of a positive charge the size of the atom containing small negative charges scattered through it.