Question 27
Give the number of electrons in the species 
, H2 and 
Now A negative charge on the species indicates the gain of an electron by it & A positive charge denotes the loss of an electron
: Number of electrons present in hydrogen molecule (H2) = 1 + 1 = 2
∴ Number of electrons in = 2 – 1 = 1
H2: Number of electrons in H2 = 1 + 1 = 2
: Number of electrons present in oxygen molecule (O2) = 8 + 8 = 16
∴ Number of electrons in = 16 – 1 = 15
