Which substance or particle does not belong to each group? iron,oxygen,gold ____, as it is made up of _____. The others are made up of ____.?

Well as far as I know about structure of atom that hydrogen has 1 electron in its shell and lithium has 2 in its inner and 1 in its outer so to go stable lithium either needs 7 electrons or needs to loose 1 electorn. In the case of hydrogen hydrogen can either loose or take 1 electron so 1lithium atom will come in hydrogen shell as shown in the pic . So here hydrogen gains 1 electron so its valency here is +1 and lithium looses 1 electron so its valency is -1.So the chemical formula is HLi.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.