Question

11. Assertion: Rutherford used gold foil for his alpha particle scattering experiment.
Reason: Alpha particles are fast moving positively charged particles.
O Both A and R are true, and Ris correct explanation of the assertion
O Both A and R are true, but Ris not the correct explanation of the assertion.
O A is true, but Ris false.
O A is false, but Ris true
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Answer 1

Answer:

Both A and R are true, and Ris correct explanation of the assertion is the crt answer

hope it helps you...

Answer 2

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The Assertion and Reason are based on Rutherford's alpha scattering experiment which lead to the discovery of nucleus inside the atom.

Here,

Assertion: The statement is correct because he used gold foil because of its high malleability. It can made into a very thin sheet which was later used in the experiment.

Reason: The alpha particles have 2 positive changes and a mass of 4 units, (similar to a helium nuclei). They most fastly. Hence, it is also correct.

But, Reason is not explaining the Assertion. Hence, the correct answer is Option B

Explore more!!

• He observed that most of the α-particles passed away undeflected. Some are deflected in some angles. And 1 out of 20,000 rebounded.

• He concluded that most of the space inside the atom is empty and a small nucleus is present at the centre with all the mass.

• He described and compared this model of atom with planetary motion.