According to modern atomic theory :

Atom is divisible.

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It consist of neutrons, protons & electrons.

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Atoms of same element are alike in all respect.

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Option A and B are correct.

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Solution

The correct option is D Option A and B are correct.
The modern atomic theory states that atoms of one element are the same , while atoms of different elements are different. This number of protons is so important to the identity of an atom that it is called the atomic number. The number of protons in an atom of the element.

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Similar questions

Assertion : A future discovery of sub atomic particles led to the failure of Dalton’s atomic theory.

Reason : An atom is made up of protons, neutrons and electrons.

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