Scattering of α-particles by a thin gold foil suggests the presence of
[amp_mcq option1=”electron in an atom” option2=”proton in an atom” option3=”positively charged nucleus at the centre of an atom” option4=”isotopes of gold” correct=”option3″]
This question was previously asked in
UPSC CDS-1 – 2020
Rutherford’s alpha-particle scattering experiment demonstrated that a small, dense, positively charged nucleus exists at the center of an atom.
The deflection of positively charged alpha particles at large angles, and the reflection of a few back towards the source, indicated that they were encountering a strong positive charge concentrated in a very small volume within the atom, which was termed the nucleus.