Which of them are atomic models?

i & ii

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i, ii & iii

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ii, iii & iv

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All of these

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Solution

The correct option is C All of these
Plum pudding model was proposed by J.J. Thomson in 1904. Ernest Rutherford proposed his Rutherford's nuclear model in 1911. Soon after, Neils Bohr gave his own model of an atom in 1913. Later on, Sommerfeld introduced two modifications in the Bohr's model of an atom in 1915-1916.
Hence all the above are atomic models.

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