CBSE Class 9 Answered
α-particles are doubly-charged helium ions. Since they have a mass of 4 u, the fast-moving α-particles have a considerable amount of energy.
Rutherford's Model of an Atom - Part 1This video explains the gold foil experiment by Rutherford.
Rutherford's Model of an Atom - Part 2This video explains Rutherford's model of an atom and the drawbacks of the ...
Structure of Atom - Exam Decoded - 2This video contains questions on Rutherford's model of an atom.