Question

Elemental chlorine exists as a diatomic molecule Cl2.

Chlorine atoms exist in two different isotopes 35Cl and 37Cl.

In the mass spectrum of chlorine molecules,
how may peaks due to chlorine atoms would be observed? 2

how many different peaks due to the molecular ion would be observed? 3

35Cl is three times as abundant as 37Cl.
Which of the three molecular ion peaks would be least intense?
m/z 74
m/z 72
m/z 70

Answer 1

Please explain each of the question....I guessed which is not good..I need to understand.........

Answer 2

I found this site that does a really neat job of explaining the five lines ones gets from Cl2. Scroll down from the top until you get to the Cl2 part.
http://www.chemguide.co.uk/analysis/masspec/elements.html