What is the specific charge of Magnesium ion? (Mg2+)
For what I did is : Specific charge = charge / mass
= (2x1.6x10-19)/(24x1.67x10-27+10x9.11x10-31)
= 8330000
= 8.33 x 106 C/kg
However the answer from the book is 7.98 x 106 C/kg. What have I done wrong?