Why some atoms form ionic bond while other form covalent bond?

Answer 1

Every atom in the universe tends to get the electronic configuration of thier nearest noble gases because those gases are stable so these atoms gain or lose electrons forming ions.The ions of opposite charges attract each other to form ionic bond.The ionic bonds are formed by exchanging electrons.The covalent bonds are formed by mutual sharing of electrons because the atoms do not have enough electrons to donate or to gain.These atoms share electrons to get electronic configuration of nearest noble gases.Examples of ionic bond are NaCl and examples of covalent bonds are H2,Cl2.

Answer 2

Atoms form ionic bonds when one atom transfers electrons to another, resulting in the formation of positive and negative ions that are held together by electrostatic forces. On the other hand, atoms form covalent bonds by sharing electrons to achieve a more stable electron configuration. The difference in electronegativity between the atoms determines the type of bond that will be formed - greater differences lead to ionic bonds, while similar electronegativities result in covalent bonds.