Question

What is the thing which is present in Rutherford’s atomic model and not present in Dalton’s and Thomson’s atomic models?

Answer 1

Rutherford overturned Thomson's model in 1911 with his well-known gold foil experiment in which he demonstrated that the atom has a tiny and heavy nucleus. Rutherford designed an experiment to use the alpha particles emitted by a radioactive element as probes to the unseen world of atomic structure.

Answer 2

Dear Student,

◆ Answer -

Nucleus is the thing which is present in Rutherford’s atomic model and not present in Dalton’s and Thomson’s atomic models.

◆ Rutherford's model of atom -

• In 1911, Rutherford coined the planetary model of atom with the help of his gold-foil experiment.
• In this model, he bombarded alpha particles from radioactive elements on the shining screen.
• He compared the results to atomic structure demonstrating that atom has heavily charged nucleus surrounded by empty space.

From the gold-foil experiment Rutherford concluded that -

• Most of the atom is empty space containing negative charges.
• Atom have very small positively charged nucleus.

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