When creating a model of an atom, the best way to distinguish between protons and neutrons is to label them according to their electric charge. Here’s how they can be represented in a model:
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Protons: These are positively charged particles. You can label each proton with a positive sign (+).
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Neutrons: These particles have no electric charge (they are neutral). You can label each neutron with a zero (0) or indicate that they are neutral by not adding any charge label.
In a typical atomic model, protons and neutrons are found in the nucleus of the atom, while electrons (which have a negative charge) orbit around the nucleus.
Therefore, the correct way to distinguish protons and neutrons in an atomic model is to label protons with a positive sign and neutrons with a zero.