Strutural formula for hydrogen gas?
what is the formula name for hyrdrogen bromide as a gas?
The name for hydrogen bromide as a liquid is hydroen bromide
The name for hydrogen bromide as water is hydrobromic acid
I am unsure what you mean by the formula for Hydrogen and Helium because both are an element, not a compound and you would generally not have a formula for an element. However, I can tell you that the difference between the formula for Hydrogen gas and Helium gas if; Hydrogen gas: H2 H-H Helium gas: He Hope this helps