The elements, if arranged according to their atomic weights, exhibit an apparent periodicity of properties.
-- Dmitri Mendeleev
   
Dmitri Mendeleev   Name:
Dmitri Mendeleev
Type:
Scientist
Nationality:
Russian
Birth:
February 8, 1834
Death:
February 2, 1907
https://www.nutquote.com/quote/Dmitri_Mendeleev