What happened when bromine reaction with aluminum

formation reaction.

Explanation:

Since the aluminum bromide produced in this reaction is formed from elements in their standard states, this is an example of a formation reaction.

indium, and thallium have three electrons i think

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.