I think that it is chemical formula.
A chemical formula is a representation of a compound using symbols of elements and numbers indicating the ratio of atoms. It shows the types and numbers of atoms present in a compound.
It is an expression.
Chemical compound
Subscript
Scientists call a group of symbols and numbers that stands for a compound a chemical formula. This formula shows the type and number of atoms that make up the compound.
A combination of symbols and numbers that describes a molecule is called a chemical formula. It represents the types of atoms present in the molecule and their respective ratios. The symbols represent the chemical elements (e.g., H for hydrogen, O for oxygen) and the numbers indicate the number of atoms of each element in the molecule. Chemical formulas are essential for understanding the composition and structure of molecules in chemistry.
The chemical formula of a compound provides information about the elements present in the compound and the ratio in which they are combined. The subscripts in the chemical formula indicate the relative number of atoms of each element in a compound.
The formula of a compound is written using the symbols of the elements present in the compound and subscript numbers to represent the ratio of each element in the compound. The subscript numbers indicate how many atoms of each element are present in a molecule of the compound.
A chemical formula shows the types and numbers of atoms in a compound. To read it, identify the elements and their respective numbers in the formula. The elements are represented by their symbols, and the numbers indicate the ratio of atoms in the compound.
Compounds can be described using element symbols and numbers
A chemical formula provides information about the types and numbers of atoms in a molecule, but it does not reveal the spatial arrangement of those atoms in the molecule. It is a concise way to represent the composition of a substance using chemical symbols and numerical subscripts.
A substance can be described using its chemical formula, which consists of the chemical symbols for the elements in that substance and the corresponding numbers to indicate the ratio of each element present in the compound. For example, the chemical formula for water is H2O, showing that it is composed of two hydrogen atoms and one oxygen atom.