Alpha particle scattering setup — task. Chemistry CBSE Live product, Class 9.

Choose the correct answer:

1. Which of the following is incorrect about alpha particles?

They are lighter than electrons
They consist of 2 protons and 2 neutrons
They are helium nuclei carrying a 2+ charge
They are high-energy, fast-moving particles heavier than a proton

2. Which metal was used in Rutherford’s experiment and why?

Silver, because it is heavy
Copper, because it conducts electricity
Gold, because it is malleable and can be made into very thin foil
Aluminum, because it is light

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