Dot and cross diagrams help us to model when ions are formed from atoms. Here’s an example using sodium and chlorine. They form ions which bond to form sodium chloride.

KirBac channels are the bacterial homologs of mammalian inwardly rectifying potassium (Kir) channels. All available structures are closed at the helix bundle crossing, but the crystal structure of ...

Here are some other examples of dot and cross diagrams for the formation of ions in some ionic compounds – magnesium oxide and calcium chloride.