Question

What is the chemically combined substance of a hydrogen atom and a helium atom. please help me because i really don't know this is confusing really please and thankyou

Hydrogen atoms don't normally combine with helium atoms. In fact, helium atoms don't combine with much of anything. In atomic nuclear reactions the goal has been to fuse hydrogen atoms (actually deuterium atoms) to form helium atoms but I don't classify that as a chemical compound. Since you are confused about this, perhaps you could rephrase your question and we can work toward helping you.

Sorry mr bob but that is what my teacher had up there

I agree with DrBob, there is no chemical substance which combines H and He.