Question

an ion is an atom with a charge. ions are charged because there is a different number of ____________ then protons.
neutrons
protons
electrons
quarks

Explanation:

An atom is neutral when the number of protons (positively - charged) equals the number of electrons (negatively - charged). An ion is formed when an atom gains or loses electrons. Neutrons have no charge, so a difference in neutron number doesn't create a charge. Protons are what give the element its identity (atomic number), and changing the number of protons changes the element. Quarks are sub - particles that make up protons and neutrons.

Answer:

C. electrons