He's known for a number, 8 letters
Italian chemist with a number named after him, 8 letters
Italian scientist who lent his name to a number, 8 letters
Physicists have his number?, 8 letters
You might get his number in chemistry class, 8 letters
Italian physicist noted for his work on gases, 8 letters
Proposed what has come to be called Avogadro's law (1776-1856), 8 letters