Question

Which of the following statements best explains why J.J. Thompson's Plum Pudding model had to be revised? (2 points)

Experimental evidence showed that there was a small, dense area within the atom. Experimental evidence showed that electrons were located within a small nucleus. Atoms have neutrons and electrons clustered together in the center.
Atoms have protons and electrons organized in energy levels.

Answer 1

Rutherford's experiment showed that Atoms have protons in the nucleus. The reason is because his alpha particles (two protons & two neutrons with no electrons), when striking an atom, either went straight through, or bounced off at a large angle.

When finding this, I believe your answer would be D, the last one.

Answer 2

Answer: Option (a) is the correct answer.

Step-by-step explanation:

J.J. Thompson had discovered that there are positive and negative charges present inside an atom. But he did not mentioned where exactly these charges are located inside the atom.

So, later of Rutherford discovered that there is a small dense mass present inside an atom that is called nucleus. And, inside the nucleus there were protons and neutrons. Electrons were orbiting around the nucleus of an atom.

Hence, we can conclude that J.J. Thompson's Plum Pudding model had to be revised because experimental evidence showed that there was a small, dense area within the atom.