Answer:
- A covalent bond is formed as the result of sharing electrons.
Explanation:
There are three kind of chemical bonds: covalent, ionic, and metallic.
The chemical bonds are the result of the interaction of the valence electrons of the atoms.
The valence electrons may be:
- Donated / accepted: an atom donates one or more electrons which are taken by one or more other atoms. In this case, the atom that donates electrons becomes a positve ion (cation) and the atom that takes electrons becomes a negative ion (anion). Then, as positive and negative charges are attracted to each other, a strong electrostatic attraction arises between cations and anions, and this is what is called an ionic bond.
- Shared between a pair of atoms: in this case, none of the atoms gets rid of any electron, instead, to complete the valence electron shell (octet rule) both atoms share some electrons. In this case, each pair of shared electrons is a covalent bond.
Thus, this is the answer to your question: a covalent bond is formed as the result of sharing electrons.
- Delocalised: metals posses a number of delocalised electrons, i.e. electrons that are losely attached to their nuclei, and so these electrons are shared by a number of atoms. The bond formed is called metallic bond, is depicted as a sea of electrons, because many electrons are moving freeely among many atoms.
