Answer:
A. Put six protons in the center of the model, and six electrons around the outside, then add one electron or take away one electron to make an ion.
Explanation:
To make an ion from a given atom, either one electron is added to it or taken away from it.
In an atomic space, protons and neutrons occupy the center of the atom called nucleus.
Electrons moves round the extranuclear space.
This gives an ion.