Chapter 15 - Electric Charge, Forces, and Fields - Learning Path Questions and Exercises - Multiple Choice Questions - Page 553: 1

(c) +$1.6×10^{-19}$C

Charge of one electron =$-1.6\times10^{-19}C$ Charge of one proton= $+1.6\times10^{-19}C$. Net charge is the sum of charges of all protons and electrons. i.e, Net charge= 2($-1.6\times10^{-19}C$)+ 3($+1.6\times10^{-19}C$)= +$1.6×10^{-19}$C