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Give the number of electrons in the species  H2+, H2 and O2+ .

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The number of electrons in the species H2+, H2 ,O2+ is 1, 2, and 15, respectively.
Because the hydrogen ion has a positive charge, it represents the elimination of one of two electrons.
Two hydrogen atoms with two electrons apiece make up hydrogen gas. Because the oxygen ion has a positive charge, one of its 16 electrons has been taken

Final Answer:-.
H2+ = (21) -1=1
H2 = (21) =2
O2+ = (28)-1=15

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