Which of the following pairs is called isoton | vedclass

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(A) Isotones are atoms of different elements that have the same number of neutrons.To find the number of neutrons $(N)$, we use the formula $N = A - Z

Vedclass · Accepted Answer

$^{198}_{80}	ext{Hg}, ^{197}_{79}	ext{Au}$

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(A) Isotones are atoms of different elements that have the same number of neutrons.To find the number of neutrons $(N)$, we use the formula $N = A - Z$, where $A$ is the mass number and $Z$ is the atomic number.For $^{198}_{80}	ext{Hg}$: $N = 198 - 80 = 118$.For $^{197}_{79}	ext{Au}$: $N = 197 - 79 = 118$.Since both atoms have the same number of neutrons $(118)$, they are isotones.For other options:- $^3_1	ext{H}$ $(N=2)$ and $^3_2	ext{He}$ $(N=1)$ are not isotones.- $^{214}_{82}	ext{Pb}$ $(N=132)$ and $^{214}_{83}	ext{Bi}$ $(N=131)$ are not isotones.- $^{12}_6	ext{C}$ $(N=6)$ and $^{14}_6	ext{C}$ $(N=8)$ are isotopes, not isotones.

Which of the following pairs is called isotones?

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