Question

Why N2+ has 13 electrons and N2- has 15 electrons?

Answer 1

atomic number for N2 is 14
in N2+ one electron is lost so 14-1=13
in N2- one electron is gained so 14+1=15

Answer 2

N2 = 14 electrons

N2+ = 13 , because the positive charge says that the molecule has loose one electron . Nowwww the no. Of protons = 14 > no. Of electrons = 13

Thats why it has a positive charge

In the second case

N2- = 15 electrons

Because it gained an electron from nearby atoms . And hence its negativity increased because the no. Of electrons now > protons

And hence it has 15 electrons

Hope u understood :))))