Which of the following pair of nuclei are isobars of the element?
and 
and 
and 
and 
Text Solution
Verified by ExpertsA
Isobars are atoms of different chemical elements that have the same number of nucleons (mass number 
), but different atomic numbers ( 
).
In the given options:
and 
: Both have the same mass number 
. Since they have different atomic numbers ( 
and 
), they are isobars.
and 
: These have the same atomic number ( 
) but different mass numbers. They are isotopes.
and 
: These have different mass numbers (198 and 197).
and 
: These have the same atomic number 
but different mass numbers. They are isotopes.
Thus, the pair 
and 
are isobars.
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