Question

describe how to identify a coefficient in a chemical formula and its impact. it is in between the element symbol and shows how many complete particles of a substance are needed it is before the element symbol and shows how many complete particles of a substance are needed it is the small number to the lower right of the element symbol and shows how many complete particles of a substance are needed it is after the element symbol and shows how many complete particles of a substance are needed

Explanation:

In a chemical formula, a coefficient is the number placed before an element symbol or a compound formula. It indicates the number of complete particles (atoms, molecules etc.) of a substance involved in a chemical reaction or present in a sample. The small number to the lower - right of an element symbol is a sub - script which shows the number of atoms of that element within a molecule, not a coefficient.

Answer:

it is before the element symbol and shows how many complete particles of a substance are needed