A Hydrogen atom is one proton, one electron. The ion has lost the 1 electron, but it is still the same element, if that's what you mean. Protons are used to define what the element is.
Normal hydrogen has one proton and no neutrons in its nucleus, so it has a mass of one.
Heavy hydrogen often called deuterium has one proton and one neutron, so it has a mass of two instead of...
When hydrogen is lit on fire it produces water...the name "Hydrogen" is made of the latin words "Hydro" (which means water) and "Genes" (which means to create)