Question

A covalent bond between two atoms is formed by which of the following.
(A) Electron nuclear attraction
(B) Electron sharing
(C) Electron transfer
(D) Electronic attraction

Answer 1

Chemical bonding is the creation of a chemical compound by forming a chemical link between two or more atoms, molecules, or ions. The atoms in the resulting molecule are held together by chemical bonds. Chemical bonding is the attractive force that keeps diverse components (atoms, ions, etc.) together and stabilises them via the overall loss of energy.

Complete answer:
Elements with extremely high ionisation energies are unable to transport electrons, whereas those with extremely low electron affinity are unable to absorb electrons. Such elements' atoms tend to share electrons with atoms of other elements or with atoms of the same element in such a way that both atoms attain an octet configuration in their respective valence shells and therefore attain stability. The term "covalent bond" refers to a link formed by the sharing of electron pairs among distinct or similar kinds of molecules.
If sharing a single electron pair between atoms does not satisfy an atom's usual valence, the atoms may share more than one electron pair.
The production of additional electrons is not a result of covalent bonding. They are solely linked by the bond.
There are very strong chemical connections between atoms.
A covalent bond typically holds roughly 80 kilocalories per mole (kcal/mol) of energy.
Covalent bonds seldom break on their own after they have been created.
The atoms that are joined have definite orientations relative to one another, hence covalent connections are directional.
The melting and boiling temperatures of most covalently bound substances are relatively low.
The enthalpies of vaporisation and fusion are frequently lower in compounds containing covalent links.
Hence option B is correct.

Note:
A covalent connection is created when the electrons from each participating atom are shared equally. Shared pair or bonding pair refers to the pair of electrons involved in this sort of bonding. Molecular bonds are another name for covalent bonding. The atoms will gain stability in their outer shell through the sharing of bonding pairs, analogous to noble gas atoms.