A formula contains numbers below the elements called__________________?

The subscripts in chemical formulas tell us the _______________of particles that combine in a compound.

A formula contains numbers below the elements called subscripts. These subscripts indicate the quantity or number of atoms of each element present in a compound.

For example, in the chemical formula H₂O, the subscript "2" indicates that there are two hydrogen atoms (H), and the absence of a subscript next to oxygen (O) indicates that there is one oxygen atom in the water molecule.

Subscripts are necessary to correctly represent the composition of a compound and determine the ratio of elements present.