Question

Tick mark the correct statements regarding formation of covalent bonds.

Covalent bond is formed due to transfer of electrons.
Sharing of electrons leads to increase in stability of atoms.
Covalent bond is formed due to sharing of electrons.
Hydrogen forms covalent bond to complete its duplet.

Answer 1

• A covalent bond is formed when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions. The bond formed between the two atoms by mutual sharing of electrons so as to complete their octets or duplets. Hence first statement is incorrect.
• Atoms will covalently bond with other atoms in order to gain more stability, which is gained by forming a full electron shell. By sharing their outer most (valence) electrons, atoms can fill up their outer electron shell and gain stability.
• Hydrogen atom has one electron in the valence shell which it shares with another hydrogen atom having one electron to complete its duplet state, i.e two electrons in the valence shell and resulting in the formation of hydrogen.

Covalent bond is formed due to transfer of electrons.
Sharing of electrons leads to increase in stability of atoms.
Covalent bond is formed due to sharing of electrons.
Hydrogen forms covalent bond to complete its duplet.