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Inductively-coupled mass spectrometry (ICP-MS) shows the signal strength of the mass/charge ration of atoms. An atom generally is ionized in ICP to lose one electron so that it bears one positive charge.

In the ICP-MS analysis of table salt, the analyst saw one predominant peak at the mass/charge ration of 23, which corresponds to the atomic weight of sodium. However, the analyst saw two big peaks around the atomic weight of chlorine (35.5) with mass/charge ratio f 35 and 37, respectively.

The intensity ratio of these two peaks was about 3:1.

If you are the analyst, you should tell a layman that the results are expected because there is/are
Select Option 123
primordial naturally occurring stable sodium isotope(s) with the abundance ratio of
Select Option 3 : 1not applicable
, while there is/are
Select Option 1234
primordial naturally occurring chlorine isotope(s) with an abundance ratio of, approximately
Select Option 1 : 12 ; 13 : 14 : 1
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