7 posts • Page 1 of 1
I noticed that when an anion is formed in a lewis dot structure, they get a bracket around the chemical symbol with 8 electrons shown as their new octet. Are we supposed to only use brackets in lewis structures for anions or do other species get them too?
The brackets are used for other species, basically any ions like cations AND anions. This is the same in covalent and ionic bonding. If you end up starting off with two ions and covalently bond them, you will have brackets around the final Lewis structure since they maintain their charge. If you transfer electrons to make new cations and anions, you put a bracket around them to specify how many electrons have been transferred or lost to form the charge and identify which is the cation and which is the anion.
The brackets are used for both cations AND anions. For example NH4+ is a cation so when you draw the structure, you put brackets around the entire molecule with a + on the outside to signify it has an overall +1 charge. For any molecule, polyatomic ion or the ions in an ionic bond, you will put the brackets around them to signify their overall charge.
Who is online
Users browsing this forum: No registered users and 4 guests