Chemistry, asked by ektapardhi4211, 1 year ago

Define the term Hydride. How many categories of hydrates are known? Name them.

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Answered by Anonymous
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Dihydrogen combines with almost all the elements, except noble gases under suitable conditions to form binary compounds called hydrides.

These can be represented as EHx (or) EmHn, where E is the symbol for an element.

Ex:EHx → MgH2
 Where x = number of hydrogen atoms
 EmHn → B2H6
 Where m = number of atoms of elements E
 and n = number of hydrogen atoms

There are three types of hydrides depending on the behaviour and the nature of the bond formed between the hydrogen atom and the element.

The types of hydrides are ionic (or) salt-like hydrides, covalent (or) molecular hydrides and metallic (or) non-stoichiometric hydrides.

Ionic (or) salt-like hydrides are binary compounds of hydrogen with s - block elements that are highly electropositive in nature. But compounds formed with lithium, beryllium and magnesium exhibit higher covalent character.

Ionic hydrides like sodium hydride and calcium hydride are formed by the transfer of electrons from the metal atom to hydrogen atom.

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