Question

what are diatoms and how they are useful?

Answer 1

s diatoms are made from silica this makes diatomaceous earth very abrasive, and so the sharpness enhances the particles as a pesticide2. Diatoms are also useful in forensic studies. If a person has drowned then diatoms are able to enter the human body.

Answer 2

diatoms by its name it is clear that their is two atoms present
the two atoms combined are of same weight and of same mass and ions