explain briefly electrovalent bond with example and covalent bond with example?

CBSE Class 10 Answered

explain briefly electrovalent bond with example and covalent bond with example?

Asked by Pranav Limbani | 26 Aug, 2012, 03:38: PM

Expert Answer

Electrovalent bond is also called as ionic bond

In ionic bonding, electrons are completely transferred from one atom to another. In the process of either losing or gaining negatively charged electrons, the reacting atoms form ions. The oppositely charged ions are attracted to each other by electrostatic forces, which are the basis of the ionic bond.

For example, during the reaction of sodium with chlorine:

sodium (on the left) loses its one valence electron to chlorine (on the right),

resulting in

a positively charged sodium ion (left) and a negatively charged chlorine ion (right).

Covalent bond:

Covalent bonding occurs when two (or more) elements share electrons. Covalent bonding occurs because the atoms in the compound have a similar tendency for electrons (generally to gain electrons). This most commonly occurs when two nonmetals bond together. Because both of the nonmetals will want to gain electrons, the elements involved will share electrons in an effort to fill their valence shells. A good example of a covalent bond is that which occurs between two hydrogen atoms.

Answered by | 27 Aug, 2012, 04:46: PM