Dmitri Mendeleev

“Even though Mendeleev always denied that electrons exist, they later turned out to be vital for ordering the elements in his table. Patricia Fara , Science A Four Thousand Year History (2009).”

“Chemical Discovery and Invention in the Twentieth Century,”

“I suppose when my unknown elements are found, more people will pay us attention.”

“I have no need of proof. The laws of nature, unlike the laws of grammar, admit of no exception.”

“We should still expect to discover many unknown simple bodies; for example, those similar to aluminum and silicon, elements with atomic weights of 65 to 75.”

“I wish to establish some sort of system not guided by chance but by some sort of definite and exact principle .”

“Doctor, you have science, I have faith.”

“To burn oil!.. You can fuel with money as well.”

“In science we must all submit not to what seems to us attractive from one point of view or another, but to what represents an agreement between theory and experiment. Faraday Lecture, the Royal Institution, London (1889) as quoted by Leon Gray, The Basics of the Periodic Table”

“The Periodic Law of the Chemical Elements”