Covalency of nitrogen in N2H4 molecule is
Answers
Covalency of nitrogen in N2H4 molecule is 3.
Covalency of an atom in a molecule is defined as the maximum number of shared electron pairs that the atom contributes in chemical bond formation or simply the number of chemical bonds (covalent or coordination) it can form with its neighbouring atom.
Nitrogen has 5 valence electrons and 1 lone pair.
It can form 3 covalent bonds with other atoms to complete its octet (5+3 = 8). As 3 covalent bonds are involved, its covalency is 3 (Eg. NH3)
Sometimes, the lone pair on N atom, is used in bond formation (coordination bonding) as a result apart from 3 covalent bonds, one extra coordination bond is also present. Here, covalency is 4. (Eg. NH4+)
In N2H2, one N atom is bonded to 2 H atoms and to 1 N atom. So, covalency must be 3.
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Q) What is covalency and how to calculate????
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