Question

The nucleus of an atom is dense and positively charged. What was observed when positively charged particles were radiated onto a gold atom during Rutherford's experiment because of this?

Negative charges were concentrated at the center of the atom
Particles that struck the center of the atom were repelled
Particles that struck the edges of the atom were repelled
Positive charges were distributed all over the atom

Answer 1

B . Particles that struck the center of the atom were repelled

Answer 2

particles that struck the center of the atom were repelled.

Step-by-step explanation:

Rutherford gave an experiment which is known as gold foil experiment. In his experiment, he took a gold foil and bombarded it with the alpha particles (carrying positive charge). These alpha particles are also known as helium nucleus.

He thought that these particles will pass straight through the foil, but to his surprise, some of them deflected their path and a few of them bounced back.

From this he concluded that in an atom, a small positive charge in the center is present. Due to this positive charge, the alpha particles deflected their path and some of them bounced straight back from their path

Hence, the correct answer is particles that struck the center of the atom were repelled.