Which of the following are nbsp-isotopes-1-1H- nbsp-1-2H- -1-3H-20-40Ca- nbsp-18-40Ar-6-12C- nbsp-6-13C- -6-14C-26-58Fe- nbsp-27-58Ni

The correct options are A _1^1H, nbsp;_1^2H, _1^3H C _6^12C, nbsp;_6^13C, _6^14C∙ Isotopes have the same atomic number (same number of protons) and differen ...

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Byju's Answer

Standard X

Chemistry

Isotopes, Isobars and Isotones

Which of the ...

Question

Which of the following are isotopes?

_{1}^{1} H

_{1}^{2} H

_{1}^{3} H

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_{20}^{40} C a

_{18}^{40} A r

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_{6}^{12} C

_{6}^{13} C

_{6}^{14} C

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_{26}^{58} F e

_{27}^{58} N i

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Solution

The correct options are
A $_{1}^{1} H$ , $_{1}^{2} H$ , $_{1}^{3} H$
C $_{6}^{12} C$ , $_{6}^{13} C$ , $_{6}^{14} C$
$∙$ Isotopes have the same atomic number (same number of protons) and different mass number.

$∙$ Since, $_{1}^{1} H$ , $_{1}^{2} H$ , $_{1}^{3} H$ have the same atomic number, they are isotopes of hydrogen.

$∙$ Similarly, $_{6}^{12} C$ , $_{6}^{13} C$ , $_{6}^{14} C$ have same atomic number, hence they are isotopes of carbon.

$∙$ Whereas, $_{20}^{40} C a$ , $_{18}^{40} A r$ and $_{26}^{58} F e$ , $_{27}^{58} N i$ have different atomic numbers and hence, are not isotopes. They are isobars as they have same mass number.

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