IS XOXOXO a good title for this story? please help?

I only read the beginning of your plot summary, but what I read was good. As for your title, it isn't very good. The reader might get confused as many people don't know what that is. When I saw your title, I thought of XOXO, meaning hugs and kisses. Perhaps you can think of a different name for the element and use that as the title. I think using the element's name for the title is a good idea, but you need to adjust the element's name.