They don't. The dissolving of salt in water is not the formation of a new compound, but rather merely creating a uniform mixture. It is not a new substance.
When salt is mixed in with water, they form a solution. Salt is the solute, and water is the solvent.
Solution
Salt and water do not form a compound of any kind - neither decimal nor chemical.
They are inorganic compounds; chemical formulas are: - ammonia: NH3 - salt: NaCl - water: H2O
They are chemical compounds
The entire range of chemical compounds available in the universe
chemical bonds
Chemical change.
A chemical change is one that creates compounds (products) that are different from the reactants. A physical change only alters the form or phase of the existing substances, not their chemical properties.
chemical bonds
chemical bonds
In "Decomposition" type of reactions, one chemical compound would split to form two or more chemical compounds. These reactions mainly occur with the supply of heat. For example: CaCO3 -----> CaO + CO2 The opposite of this, that is when many chemical compounds form one are known as "Synthesis / Combination" type of reactions.