Alpha-Amylase, an enzyme found in saliva, typically consists of around 11000 atoms. This estimation is based on its molecular mass of approximately 55.4 kDa, assuming a composition predominantly of hydrogen and carbon atoms with a 2:1 ratio and considering other heavier atoms present in the molecule. While variations may exist due to genetic differences, this approximation provides a tangible understanding of the scale of atoms within complex molecules like alpha-Amylase.