Who is this?

Hint

Cracked by: Prasad , nihit , iamniks , zatar , 2ndratequizzer , SidSen , alephnull , Atul Mathew , Varun.M , Hema and yaksha

1. Amedeo Avogadro. The constant Avogadro’s number(6.023e23) is named after him

The hint was the pic of a “Mole”. 1 Avogadro Number of anything is called a Mole :)

Prasad, nihit, iamniks, zatar, 2ndratequizzer, sidsen, alephnull, Atul Mathew, Varun.M, Hema and yaksha