The nuclear model of the atom — practice question

Which table row shows the relative charge of an electron, a neutron and a proton?

• Aelectron $-1$, neutron $0$, proton $-1$
• Belectron $-1$, neutron $0$, proton $+1$
• Celectron $+1$, neutron $-1$, proton $0$
• Delectron $+1$, neutron $0$, proton $+1$