water is formed by combining hydrogen and oxygen ....
Close, but not exactly. Hydrogen is not formed by nuclear reactions in stars, hydrogen was formed not long after the Big Bang, when the expanding universe had cooled sufficiently that an electron and a proton could combine to form a hydrogen atom. Helium and all the other elements that are heavier than hydrogen, were formed by the process of nuclear fusion, in stars.
Fusion or Nuclear Fusion
Fusion of Hydrogen into Helium giving off light (photons) and nutrinos.
Hydrogen and helium are formed in Sun.
The main one is helium from the process of fusion of hydrogen. But others are formed too, mostly from absorbing neutrons generated by the fusion process.
water is formed by combining hydrogen and oxygen ....
covalent:)
by the process of nuclear fusion
Close, but not exactly. Hydrogen is not formed by nuclear reactions in stars, hydrogen was formed not long after the Big Bang, when the expanding universe had cooled sufficiently that an electron and a proton could combine to form a hydrogen atom. Helium and all the other elements that are heavier than hydrogen, were formed by the process of nuclear fusion, in stars.
Fusion or Nuclear Fusion
Fusion of Hydrogen into Helium giving off light (photons) and nutrinos.
When hydrogen burns, water is formed.
All Hydrogen was formed moments after the Big Bang.
The hydrogen fluoride (HF) is formed.
Pressure Swing Adsorption refers to the process of purification of Hydrogen gas which is manufactured in a plant like rfinery. Hydrogen which is formed as a by-product in process like Reforming is also used as a raw material within the refinery process like Hydrotreating and Isomerization. So it has to be made impurities free for use. So Hydrogen is purified by the process known as pressure swing adsorption in which impurities are adsorbed on the surface and Hydrogen becomes clean.
Hydrogen was formed shortly after the big bang when protons "captured" free electrons.