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Which of the Following Pairs Are Isotopes ? Give Reasons for Your Choice : (I) 58 26 a , 58 28 B Or (Ii) 79 35 X , 80 35 Y - Science

Short Note

Which of the following pairs are isotopes ? Give reasons for your choice :

(i) `""_26^58"A"`,  `""_28^58"B"` or (ii) `""_35^79"X"`,  `""_35^80"Y"` 

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Solution

(i) Atoms of the same element can have different numbers of neutrons; the different possible versions of each element are called isotopes. `""^58"A"_58` and `""^58"B"_28` are not isotopes because they have different atomic numbers.
(ii)`""^79"X"_35` and `""^80"Y"_35` are isotopes as they have same atomic number.

Concept: Isotopes
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APPEARS IN

Lakhmir Singh Class 9 Chemistry - Science Part 2
Chapter 4 Structure of the Atom
Questions Based On High Order Thinking Skills (HOTS) | Q 54 | Page 213
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