For the negative ions in the list, predict the formula of the simplest compound formed between each negative ion and the aluminum ion(Br - )protons: electrons: compound:
so Bromine is 35 on the chart, that means it starts out with 35 protons 35 electronssince bromide is a -1, it means it took 1 extra electron away from somebody (Br - ) protons: 35 electrons:36 compound: AlBr3 since Al is a +3 , it needs 3 Br-1 's to balance it out
