The structure of ionically bonded things
they will form ionic lattices as the opposite charges are pulled together
the co ordination number ( the number of ions that are attracted to one of the other ions ) depends on
- the charge of the ion
- the radius
cations get smaller as they have fewer electrons but the same positive charge which pulls in all of the remaining electrons as well as there being less repulsion between the electrons in the outer shell to the last full shell
Anions get bigger as they take on one more electron so they are held in place less strongly by the fewer protons ( less of a pull ) and you have more repiulsion from the electrons now there is one more added.
the size of an ion increases down a group because
- there is another electron shell
- more sheilding
- more protons
the strength of an ionic bond depends on
- the charge of the ion
- the size of the ion looking at its radius
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