What makes up a film badge? an electrolyte paste spread across a plastic sheet

a thin film of salts and other chemicals on clear acetate

layers of photographic film covered in black paper

a panel of photographic film exposed to the air

Film badges is a personal dosimeter used for monitoring cumulative radiation dose due to ionizing radiation.

A panel or layers of photographic film covered with black paper and exposed to air ,salt,and other chemicals on clear acetate

layers of photo graphic film covered in black paper

Explanation:

The badge consists of two parts: photographic film and a holder.[1] The film emulsion is black and white photographic film with varying grain size to affect its sensitivity to incident radiation such as gamma rays, X-rays and beta particles.

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

i believe the answer is three water molecules