Asuch as h2so4, is a symbol that shows the elements in a compound and the ratio of atoms?

In chemistry,  atoms combine in a definite ratio to form a group termed as molecules. The atoms are elements that are present in the periodic table with each represented by a symbol.

For example, in H2SO4 i.e. sulfuric acid

H = hydrogen; S = sulfur and O = oxygen

The three elements combine in a ratio that balances the charge on the atoms to form a neutral molecule.

Such a representation is termed as a chemical formula