Metals and nonmetals form ionic bonds.
ionic compounds
A covalent bond is much stronger than an ionic bond.
Hydrogen Bonds
This is an ionic bond.
hydrogen bonds
Metals. The two most reactive groups of metals that readily form these bonds with nonmetals are the alkali metals and the alkaline earth metals. Groups 1A and 2A.
When 2 non metals form a bond together, it is usually a covalent bond.
Metals for positively charged ions and nonmetals form negatively charged ions.
nonmetals because they are associated with molecular compounds.
Covalent Bonds
Typically the non metals form covalent bonds. Of course some non metals will also form anions when they react with metals. Some metals can also can form covalent bonds however as their electronegativity is low these bonds are often polar covalent
ionic compounds
Oxygen and Nitrogen are both nonmetals so they would form covalent bonds.
Since nitrogen and oxygen are both nonmetals, they will form covalent bonds with each other.
A covalent bond is much stronger than an ionic bond.
Chlorine can form both ionic and covalent bonds, with metals and non-metals respectively.
Ionic Bond (between metals and nonmetals)