Which are formed when an electric discharge is passed through helium, out of the following : `He^(2+), He^(+), He^(2)^(+), He_(2)`
Which are formed when an electric discharge is passed through helium, out of the following :
`He^(2+), He^(+), He^(2)^(+), He_(2)`
A. `He^(+), He_(2)`
B. `He_(2), He^(2+)`
C. `He^(2+), He^(+), He^(2)^(+)`
D. None.
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