The Student Room Group

Mass spectrometry

Could someone please tell me what the correct answer is to this question, I believe it is only 1 and 2. But the website annoyingly does not give you the answers afterwards.991DEB0E-440E-45A7-861D-46331AD9D377.jpg.jpeg
(edited 6 years ago)
Its only 1 and 2 I think
It is 1 and 2 as the last one is wrong....it is not atomic number...it is atomic mass

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