Question

1. choose the best answer.

which part of an atoms structure was discovered by rutherford?
electrons
neutrinos
nucleus
positrons

1. choose the best answer.

which part of an atoms structure was discovered by james chadwick?
protons
electrons
neutrons
nucleus

Explanation:

• For the first question: Rutherford's gold - foil experiment led to the discovery of the nucleus. Electrons were discovered by J.J. Thomson. Neutrinos are not part of the basic atom structure discovery in this context. Positrons are antimatter counterparts of electrons and not related to Rutherford's atom - structure discovery.
• For the second question: James Chadwick discovered neutrons. Protons were known before (Rutherford was also involved in proton - related work in a different sense, but not the discovery in the context of this question). Electrons were discovered by J.J. Thomson. The nucleus was discovered by Rutherford.

Answer:

1. nucleus
2. neutrons