m/e values

[d0minicz]

Complete the table:
Ion Fragment                      m/e
CH3+
OH+
Ch3CH2+
Cl+
C2H4+
COOH3+
COOH+
C6H5+

Btw, they're all single charges to save confusion. Sorry guys I just dont know how to find the m/e values like that. Any help appreciated, thanks. And can someone explain what an m/e value is too please.                                 

[mark_alec]

Generally known as M/Z, which is just the mass on the charge, in effect all it is looking for is the molecular weight of each fragment.

For each just sum the relative atomic masses (e.g. C 12, O 16, H 1)

[d0minicz]

Thanks
Also, how do you identify the parent molecular ion ? Does it involve the relative intensity? Thanks again

[NE2000]

Thanks
Also, how do you identify the parent molecular ion ? Does it involve the relative intensity? Thanks again

Hmmm...I thought the parent molecular ion has the largest m/e, as all the other ions present are simply the result of it breaking down into fragments