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Lewis developed electronic theory of valence or theory of chemical bonding to explain the formation of chemical bond between the two atoms.
According to the electronic theory of valence, every atom tries to attain octet configuration (presence of eight electrons) in its valence shell by losing or gaining or by sharing of electrons. This is known as the "Octet Rule".
The electrostatic forces of attraction that holds the two oppositely charged ions together are known as "electrovalent bond".
The formation of the Cl2 molecule can be understood in terms of the sharing of a pair of electrons between the two chlorine atoms, each chlorine atom contributing one electron to the shared pair. Choose the most appropriate name of the bond that is formed
Electron gain enthalpy (ΔegH) is defined as the enthalpy change associated with an isolated gaseous atom (X) when it gains an electron to form its corresponding anion. The reaction can be given as below:
On the basis of nature of the element, the process of accepting electron in an atom can either be exothermic or endothermic.