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Question

Which of the following is not related as isotones with others?

A
3014Si
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B
3115P
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C
3216S
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D
3517Cl
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Solution

The correct option is D 3517Cl

Isotones are atoms of different elements containing the same number of neutrons.

Now, Let's calculate the number of neutrons.

Number of neutrons = Mass number - Number of protons

3015Si3014=16

3115P3115=16

3216Si3216=16

3517Si3517=18

Here 3015Si , 3115P and 3216S are isotones. 3517Cl is the odd one as per the relation asked.


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