Mostly Helium
Helium
The nuclear reaction that combines hydrogen to form helium and produces most of the sun's energy is called nuclear fusion. In this reaction, hydrogen nuclei (protons) fuse together to form helium nuclei, releasing a large amount of energy in the form of light and heat.
Mostly Helium
The hydrogen in the Sun is fuel for the nuclear fusion reaction.
Jupiter is not considered a miniature planet. It is a gas giant planet. It is like a miniature sun, however, in that it seems to have most of the ingredients to become a sun. What it doesn't have is enough mass to create enough pressure from gravity, to start a nuclear reaction -- which is what suns (stars) do.
hydrogen combine to form helium by nuclear fusion reaction
the suns a gas
No, the sun's energy is a byproduct of nuclear fusion, primarily hydrogen gas "burned" into helium. There are no significant quantities of complex organic hydrocarbons in our sun. While there is oxygen, the hydrogen/oxygen or carbon/oxygen chemical reaction is not what results in solar energy.
Yes In high temperature gas cooled nuclear fission reactors using the nuclear process heat.
Hydrogen
Nothing in paticular - many classes of reaction produce a gas.
Magnesium reacts with acid to produce hydrogen gas. For example reaction of Magnesium with Hydrochloric acid is..... Mg +2HCl ----> MgCl2 + H2 gas