What a covalent bond?

Answer 1

A covalent bond is a bond between two non-metallic elements. This means that they share electrons inside the molecules. OR A type of chemical bond in which there is mutual sharing of electrons between two atoms is called covalent bond. It is furthur classified into single, double, and triple covalent bond with respect to mutual sharing of one, two, and three bonds respectively. Their symbols are single, double, and triple lines between two atoms according to their type of covalent bond like one for single two for double and so on (e.g. Cl---Cl). The type of chemical bond in which one atom provides shared pair of electron for bond formation is called "Coordinate Covalent Bond". OR

Chemical bond formed between two atoms due to sharing of electron pair in which only one atom provides shared pair of electron for the formation of bond, is known as coordinate covalent bond or dative bond. In the formation of coordinate bond other atom does not provide electron for sharing. It is one sided sharing.

Formation of coordinate covalent bond is the property of atoms that have lone pair of electrons. The atom that provides electron pair is called "Donor". The other which takes it is called "Acceptor". Symbol:

Dative bond is represented by an arrow, pointing from donor atom to the acceptor.

AnswerA covalent bond is where 2 atomic orbitals overlap to form a molecular bonding and anti-bonding orbital, which allows electrons from each atom to lower their energy with respect to their original atomic orbitals.

For example 2 hydrogen atom 1s orbitals, each with 1 electron in, overlap to give a σ bonding orbital and a σ* antibonding orbital. The σ molecular orbital is as much lower in energy than the constituent atomic orbitals as the σ* orbital is higher in energy than them. however, both the electrons in the bond are in the σ bonding orbital, making them lower in energy, so bonding is favorable.

Non polar covalent bond is formed between 2 atoms of similar electronegativities and Polar covalent bond is formed between atoms of different electronegativities (electronegativity difference equal or less than 1.7). If a bond is too polarised (electronegativity difference more than 1.7) it is more favourable for electrons to fully transfer and ions are formed which attract electrostatically, with orbitals of the right shape and size to interact & ionic bond is formed.
is a form of chemical bonding that is characterized by the sharing of pairs of electrons between atoms, or between atoms and other ...

Answer 2

almost everything on this earth wants stability which is achieved by bonding bond means to join. atoms achiev stability by somehow making the number of electron in the valence shell 8 (2 in case of helium)

So when two non metallic atoms join together by sharing their valence electron so both of them atom can have 8 valence electron for themselves.This type of bonding is called covalent bond.