A [[1]] identifies each constituent element by its chemical symbol and indicates the proportionate number of atoms of each element.

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Detailed Solution

Concept- A chemical formula identifies each constituent element by its chemical symbol and indicates the proportionate number of atoms of each element. A chemical formula is a way to present the identification of a chemical compound and its information about the chemical ratios of the atoms that make up the whole molecule.
A chemical formula gives us information about the number of particular elements and helps us to know exactly what kind of element is present in a compound in what ratio etc.
For example, the chemical representation (formula) of water is

H_{2} O

. It means that water has two elements in its structure, hydrogen and oxygen and the ratio of hydrogen to oxygen is 2:1.
Hence, the answer is chemical formula.

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