The first ionisation enthalpies for two isotopes of the same elements

1.	The first ionisation enthalpies for two isotopes of the same elements are
A.	same
B.	different
C.	some what different
D.	\[\|{{E}_{1}}=2\|{{E}_{(II\text{ isotope)}}}\] (n isotope)
Answer» B. different

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The first ionisation enthalpies for two isotopes of the same elements are

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