H2O Write an education mechanism, as formed.
Covalent bond helps to form most molecules, free radicals and atomic crystalline lattices. When the covalent bond is formed between atoms, their valented electrons play (those that are on the outer electronic layer, therefore, those that are less associated with the nucleus). This connection is non-polar and polar. The first form the atoms of a single substance (non-metal), for example, CL2, N2 or H2. But the second and the water refers, they form atoms of different substances that differ in electronegativity.
There are 2 covalent bond education mechanism:
1) Colligincycle (exchange)
2) Coordination (donor-acceptor), which is interested in us. It consists in providing a common electronic pair of one of the atoms (donor El.para), and the other atom gives only a vacant atomic orbital.