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Question
When alpha particles are sent through a thin gold foil, most of them go straight through the foil, because ______.
Options
alpha particles are positively charged.
the mass of an alpha particle is more than the mass of an electron.
most of the part of an atom is empty space.
alpha particles move with high velocity.
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Solution
When alpha particles are sent through a thin gold foil, most of them go straight through the foil, because most of the part of an atom is empty space.
Explanation:
When we pass the alpha particle on gold foil in Rutherford's alpha scattering experiment, there are a few observations that are recorded as:
- The majority of the particles are not deflected.
- Some of the particles are bent at tiny angles.
- Very few particles are deflected and returned by 180°.
As a result, we can deduce;
- The majority of the space in Atom is empty.
- A nucleus is a small location where a very small mass is concentrated.
- The mass of an atom is concentrated in the core nucleus, leaving the rest vacant.
- As a result, when positively charged alpha particles are delivered through metal foil, they pass straight through the foil.
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