hydrogen.
helium is after haydrogen it means hygrogen is lighter than helium. now the question arises that "Q.1"why we use helium instead of hydrogen coz hydrogen is lighter than helium. Ans.1:hydrogen has 1 electron in its 1st shell and helium has it's complete shell with two electron. When we fill hydrogen in the baloon they form ionic bond... so it is used double...
This is a fusion process, the nuclear reaction that powers our Sun. Hydrogen and hydrogen isotopes come together to make helium
Hydrogen gas makes the ballon lighter than air therefore it drifts upwards
Hydrogen gas is flammable. Hydrogen has been used in the past as it has much greater lift capacity than Helium but H2 flamability was made all too apparent when the Hindenburg burned in New Jersy in 1937 killing 35 of the 97 on board.
The big bang produced the helium no present in the sun's core. The universe cooled down enough after the big bang to form the formation of helium and hydrogen.
Even in an old star just before it explodes, the majority of the star in hydrogen gas. But as the hydrogen is fused, the helium residue begins to interfere with the hydrogen fusion, like ashes in the bottom of a fireplace.
The percentages vary quite a lot from one star to another. The general tendency, however, is that the majority of stars contain a large percentage of hydrogen. In general, hydrogen is the most abundant element in the Universe - for now. In the future, it will gradually be used up, and there will be less hydrogen, and more of the heavier elements.
Hydrogen was one of the earliest gases to be used for inflatable flying balloons, but following the Hindenberg disaster helium is now used, as it is chemically inert.
Rigel has exhausted its supply of hydrogen and so is now composed mainly of helium, with minute quantities of heavier elements.
Hydrogen was used for balloons and airships(zeplins) because it is the lightest gas, but highly flammable, so now we use helium because it is very safe. Hope this helped xxx
In the early universe there was only Hydrogen and Helium (and a smidgen of Lithium).
Hydrogen atoms are fusing into helium atoms in the Sun's core through the process of nuclear fusion. This fusion reaction releases a tremendous amount of energy that powers the Sun and produces light and heat.