Question

Bromine consists two isotopes Br-79 n Br-81 wth relative abundance 50% n 50% respectively.Apart frm peaks at79 n 91, due to Br+ ions frm these two isotopes, the mass spectrum of r also shows peak at 158,160 n 162
a)what are the ions that give rise to these three peaks in spectrum of Br
@aaronq

Answer 1

they're molecular ions, 79 +79 =158, 79+81=160, 81+81=162

Answer 2

Okay..what must I do next

Answer 3

so just specify which isotopes make up the ions

Answer 4

Br+ ?

Answer 5

you're not specifying which isotope, and there are 2 (hence molecular). Basically all the combinations are there

Answer 6

so u mean that 158 is 2 of Br 79
160 is 1 of Br 79 and 1 of Br 81
162 is 2 of Br 81

Answer 7

like this? @aaronq

Answer 8

yep, thats exactly it. He might need to put it into whatever type of notation he's using though, like \(^{79}Br_2^+\)

Answer 9

this is how you do it @eric_d

Answer 10

btw that 2 from right side of Br
it means there are 2 of it? @aaronq

Answer 11

yep, two \(^{79}Br\) isotopes

Answer 12

Okay, understood
Thank you

Answer 13

no problem dude

Answer 14

:D good :)