If a oxygen ion has 8 proton and 6 electrons what is the charg coulombs

1 answer

net charge would be 2 * proton charge = 2 * +e = +2 * 1.6 * 10^-19 Coulombs
HOWEVER that is NOT an oxygen ion
O-2 is in fact 8 protons and TEN electrons
two electrons in first shell and eight in second shell, filling it.
So net charge is MINUS 2 * 1.6*10^-19
Typo or fundamental error ?