An ionic bond or covalent bond.
chemical bond
The chemical reaction is the H2O bond with O2.
chemical reaction
It is true that when bonds are broken there is chemical reaction. Then heat energy is released.
Chemical bonds are made and broken by chemical reactions. After chemical bonds have been broken, then energy is released, and if a chemical bond is made, then energy is absorbed.
Chemical bonds are both formed and broken during chemical reactions. For example, bonds are formed and broken in the synthesis reaction 2H2 + O2 = 2H2O. The bonds in both diatomic oxygen and hydrogen are broken, forming new bonds to form a water molecule.
Chemical reactions always involve changes in the chemical bonds that join atoms in compounds. At least one chemical bond is broken or formed during a chemical reaction.
An exothermic reaction is a reaction that happens when energy is release. This means that a bond is being broken. Because the bond is broken, it has undergone an exothermic reaction.
they bond together
Bond energy
a chemical reaction always converts reactants to products. Products are always formed otherwise it's not considered a chemical reaction.
The bonds between the atoms in the reactants are broken, and new bonds are formed which results in new products, different from the reactants.