Question

3 which of these is an ion?

Explanation:

An ion is an atom or molecule with a net electric charge due to the loss or gain of electrons. In an atom, protons have a positive charge, electrons have a negative charge, and neutrons have no charge. A neutral atom has an equal number of protons and electrons. An ion has an unequal number of protons and electrons. In option B, there are more electrons (blue - negative charge) than protons (orange - positive charge), giving it a net negative charge, making it an ion.

Answer:

B.