Hey guys help me in hydrogen and it’s compounds .
The hydrides.
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Atomic Hydrogen
Hydrogen is the most abundant element in the universe. Earth's primordial atmosphere was probably similar to the gas cloud that created the sun and planets. It consisted mainly of hydrogen and helium, along with methane, ammonia, and water. Atomic hydrogen has 1 proton in its nucleus and 1 electron in a 1s atomic orbital. Deuterium is a stable isotope hydrogen with 1 neutron in the nucleus along with the proton. Tritium is a radioactive isotope with 2 neutrons in its nucleus.
Molecular Hydrogen
Two hydrogen atoms can combine their electrons to form a 2-electron bond. Elemental hydrogen, H2, is the simplest of the molecules. What do we know about hydrogen?
Hydrogen is a lighter-than-air, flammable, diatomic gas. It is colorless and only sparingly soluble in solvents.
It boils at -253.5 deg C.
Platinum metal or heat can catalyze the reaction of hydrogen with oxygen to form water.
In hydrogen fuel cells, the chemical oxidation of hydrogen to water produces electricity. (We'll talk about this next time!)
Hydrogen reacts with halogens (X2) in radical chain processes to make HX. For example:
Cl-Cl 2 Cl
Cl + H2 HCl + H
H + Cl2 HCl + Cl
net reaction: H2 + Cl2 2HCl
Hydrogen adds to metals to make metal hydrides.
Hydride
A hydride is the anion of hydrogen, H−, or more commonly it is a compound in which one or more hydrogen centres have nucleophilic, reducing, or basic properties. In compounds that are regarded as hydrides, the hydrogen atom is bonded to a more electropositive element or groups. Compounds containing hydrogen bonded to metals or metalloids may also be referred to as hydrides. Common examples are ammonia (NH3), methane (CH4), ethane (C2H6) (or any other hydrocarbon), and Nickel hydride (NiH), used in NiMH rechargeable batteries.
Almost all of the elements form binary compounds with hydrogen, the exceptions being He, Ne, Ar, Kr, Pm, Os, Ir, Rn, Fr, and Ra.
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