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In a sample of ethyl ethanoate (CH3COOC2H5), the two oxygen atoms have the same number of electrons but different number of neutrons. Which of the following is the correct reason for it?

A. One of the oxygen atoms has gained electrons

B. One of the oxygen atoms has gained two neutrons

C. The two oxygen atoms are isotopes

D. The two oxygen atoms are isobars

1 Answer

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by (54.9k points)
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Best answer

Atoms of the same element having same atomic number but different mass
numbers are known as isotopes.

As the charge is zero implies that there is no change in the number of electrons and
also the number of protons in the two-oxygen atom is the same as they have the same atomic number. Different number of neutrons implies that they are isotopes.

Hence, the correct option is C.

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