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Question

Statement 1 : The isotope Cl-37 has 17 protons, 17 neutrons, and 17 electrons.
Statement 2 : The atomic mass of chlorine is 35.43 amu.

A

Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1

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B

Both Statement 1 and Statement 2 are correct and Statement 2 is not the correct explanation of Statement 1

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C

Statement 1 is correct but Statement 2 is not correct

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D

Statement 1 is not correct but Statement 2 is correct

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E

Both the Statement 1 and Statement 2 are not correct

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Solution

The correct option is E

Statement 1 is not correct but Statement 2 is correct


Cl37 has 17 protons, 17 electrons but 20 neutrons.
Statement 1 is incorrect.
Average atomic mass of chlorine= [Atomic mass of Cl35× abundance+ Atomic mass of Cl37× abundance]/100
34.968×75.60+36.956×24.40100
35.453amu
Hence, Statement 2 is correct.

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