In the Rutherford's experiment the most particles have the same charge, so the same charges repel each other therefore the particles deflected.
In the Rutherford's experiment some of the particles deflected, honestly the Rutherford thought that the particles would fly straight through the foil. However, he found that the particles path would be shifted or deflected when passing through the foil. This is due to the fact that like charges repel each other. But the main reason is that the positive charge of the atom is spread throughout the atom that repelled and deflected the positively charged α-particles.
So we can conclude that in the Rutherford's experiment the most particles have the same charge, so the same charges repel each other therefore the particles deflected.
Learn more about Rutherford’s experiment here: https://brainly.com/question/14996029
#SPJ1