The video discusses the transition from the plum pudding model to Rutherford's atomic model. It explains how Rutherford's Gold foil experiment, conducted with Geiger and Marsden, challenged the existing atomic structure theory. The experiment used alpha particles to bombard a thin gold foil, expecting them to pass through with minimal deflection. However, unexpected deflections and rebounds led to the conclusion that the atom has a dense nucleus, contradicting the plum pudding model. This breakthrough paved the way for a new understanding of atomic structure.

What was the widely accepted model of the atom before Rutherford's experiment?

• Nuclear model

• Quantum model

• Plum pudding model

• Bohr's model

Who were the scientists involved in the Gold foil experiment along with Rutherford?

• Hans Geiger and Ernest Marsden

• Niels Bohr and Max Planck

• J.J. Thomson and James Chadwick

• Albert Einstein and Enrico Fermi

Why did Rutherford choose alpha particles for his experiment?

• They were easily available

• They were neutral and had no charge

• They were heavier and had high energy

• They were lighter and had low energy

What was the purpose of the fluorescent screen in Rutherford's experiment?

• To measure the speed of alpha particles

• To emit alpha particles

• To detect radiation by glowing

• To block alpha particles

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According to the plum pudding model, how should alpha particles behave when passing through an atom?

• They should be absorbed by the atom

• They should rebound back

• They should pass straight through with little to no deflection

• They should be deflected at large angles

What was the unexpected observation made by Rutherford during his experiment?

• Some alpha particles were deflected at small angles

• Alpha particles emitted light

• All alpha particles passed straight through

• Alpha particles were absorbed by the gold foil

What was the most surprising result of Rutherford's experiment?

• All alpha particles passed straight through

• Alpha particles emitted light

• Some alpha particles rebounded

• Alpha particles were absorbed

What did Rutherford conclude about the structure of the atom based on his experiment?

• Atoms have a dense central nucleus

• Atoms are indivisible

• Atoms are solid spheres

• Atoms are made of only electrons

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Which model of the atom was disproved by Rutherford's experiment?

• Quantum model

• Bohr's model

• Nuclear model

• Plum pudding model

What did Rutherford's new atomic model propose?

• Atoms have a dense central nucleus with electrons orbiting around

• Atoms are indivisible

• Atoms are made of only protons

• Atoms are solid spheres

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