A chemical formula is a symbolic representation of a chemical compound, which shows the types and numbers of atoms present in the compound.
Chemical formulas are written using the symbols of the elements present in the compound, along with subscripts to indicate the number of atoms of each element. For example, the chemical formula for water is H2O, which shows that there are two hydrogen atoms and one oxygen atom in each molecule of water.
The purpose of a chemical formula is to provide a concise and standardized way of representing a chemical compound. It allows scientists to easily communicate and understand the composition of a compound, and is also used for writing chemical equations and determining the mass and properties of a substance.
Compounds are formed when two or more elements chemically react with each other, combining in specific ratios to form a new substance. This process is known as a chemical reaction.
A molecule is a group of atoms held together by chemical bonds, while a compound is a substance made up of two or more different types of atoms chemically bonded together. All compounds are molecules, but not all molecules are compounds.