The question is probably more "Which elements form covalent bonds?" Ionic bonds are between a metal and a non-metal. COVALENT bonds are between two non-metals.
Atoms do not form molecules through ionic bonding. They form molecules through covalent bonding, in which the atoms share electrons.
Potassium is a metal and metal atoms, including potassium, undergo metallic bonding, not covalent bonding. You can read about metallic bonding by clicking on the related link below.
The atoms which don't donate electrons and cant even get electrons due to energy considerations form covalent bonding.
Nitrogen and Oxygen being both nonmetals, they would form a covalent bond between the two.
I believe your question is: 'What is a covalent bond?'A covalent bond is a form of chemical bonding that is characterized by the sharing of pairs of electrons between atoms.
Reactive elements have atoms that can combine to form compounds. The atoms in a compound are combined through different types of bonds, such as ionic, covalent, hydrogen, and metallic bonding. With ionic bonding, there is an exchange of electrons between atoms. Covalent bonding occurs when electrons are shared by two atoms.
Atoms do not form molecules through ionic bonding. They form molecules through covalent bonding, in which the atoms share electrons.
Covalent bonds
Potassium is a metal and metal atoms, including potassium, undergo metallic bonding, not covalent bonding. You can read about metallic bonding by clicking on the related link below.
atomic bonding: A bond between two or more atoms, fixing them together to form molecules, crystals, etc. There are three basic types of primary atomic bonding, ionic, covalent, metallic.
The atoms which don't donate electrons and cant even get electrons due to energy considerations form covalent bonding.
Nitrogen and Oxygen being both nonmetals, they would form a covalent bond between the two.
I believe your question is: 'What is a covalent bond?'A covalent bond is a form of chemical bonding that is characterized by the sharing of pairs of electrons between atoms.
the purpose of covalent bonding is to attain a noble gas configuration
chemical bonding
The simple answer is a Covalent bond. Polar covalent bonds have an unequal sharing. Pi bonds, which also involve can lead to a delocalisation of the electron pair. Multicentre bonds such as the so-called banana bond in diboarne has a pair shared across a B-H-B bridge.
Any molecule with two non metal atoms (HCl, HF or O2 as examples) form a covalent bond between the bonding atoms.