When a gold sheet is hombarded by a beam of `alpha`- particle , only a few of them get deflected whereas most go straight , underflected . This is because:
A. The force of attraction exerted on the `alpha` - particle by the oppositely charged electrons is not sufficient .
B. A nucleus has much smaller volume than that of atom .
C. The force of repulsion acting on the fast moving `alpha`-particle is very small.
D. The neutrons in the nucleus do not have any effect on the `alpha` - particles.
