In the mass spectrum of Br2, the two isotopes of bromine (79Br and 81Br) are roughly equally distributed. However, the Br₂

Question

In the mass spectrum of Br2, the two isotopes of bromine (79Br and 81Br) are roughly equally
distributed. However, the Br₂ fragments shows three distinct lines of roughly of 1:2:1 ratio at
masses of 158, 160, and 162. Which one of the following would be the best explanation?
None of the explanation is correct.
When 79Br combined with 81Br, equal amount of two different mass are added. When 79Br or 81Br form Br₂
by itself, only one isotope mass is involve. Thus the amount of two different mass combined are twice as
much as only one mass combined with itself.
Both explanations are correct.
When the two isotopes combined, the amount of 79Br79Br, 79Br81 Br, 81 Br79 Br, and 81Br81 Br all have the
same amount, since 79Br81Br and 81 Br79Br have the same mass, they appear on the same line. Thus the ratio
of mass 160 are twice as those of 158 and 162.

Kunduz · Accepted Answer

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