“The definite mass ratios involved in reactions suggested a convenient method for counting the number of atoms of each element participating in the reaction. These results, summarized as the laws of chemical combination, provided overwhelming, if indirect, evidence for the existence of atoms and molecules.”

Principles of Modern Chemistry (7th ed., 2012), Ch. 1 : The Atom in Modern Chemistry

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David W. Oxtoby13

President of Pomona college 1951

David W. Oxtoby (1951) President of Pomona college

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Principles of Modern Chemistry (7th ed., 2012), Ch. 2 : Chemical Formulas, Equations, and Reaction Yields

“1. Small particles called atoms exist and compose all matter; 2. They are indivisible and indestructible; 3. Atoms of the same chemical element have the same chemical properties and do not transmute or change into different elements.”

John Dalton (1766–1844) English chemist, meteorologist and physicist

A New System of Chemical Philosophy, Part I http://books.google.com/books?id=Wp7QAAAAMAAJ (1808) as quoted by Richard Reeves, A Force of Nature The Frontier Genius of Ernest Rutherford (2008)

“Nothing exists, save atoms and their combinations. There is no atom, which wouldn't periodically take part in life.”

Konstantin Tsiolkovsky (1857–1935) Russian and Soviet rocket scientist and pioneer of the astronautic theory

Ничего нет, кроме атомов и их сочетаний. Нет атома, который периодически не принимал бы участия в жизни <br class="br">from Новая этика (из монизма) http://tsiolkovsky.org/ru/kosmicheskaya-filosofiya/novaya-etika-iz-monizma/

“A diatomic molecule is a molecule with one atom too many.”

Arthur Leonard Schawlow (1921–1999) American physicist

as quoted in [Dave DeMille, Diatomic molecules, a window onto fundamental physics, Physics Today, 2015, December, 34, 68, 12, 10.1063/PT.3.3020]

“Dalton, the mathematical tutor, following up the lead of Newton, combined the whole of the results of quantitative measurement which had accumulated up to his time, in a comprehensive theory, based on the concept of the chemical atom.”

J. R. Partington (1886–1965) British chemist

Introduction
Higher Mathematics for Chemical Students (1911)

“We are all connected; To each other, biologically. To the earth, chemically. To the rest of the universe atomically.”

Neil deGrasse Tyson (1958) American astrophysicist and science communicator

“Chemists think in the highly visual nanoscopic world of atoms and molecules, but they work in the tangible world of macroscopic laboratory apparatus. These two approaches to the chemical sciences cannot be divorced.”

David W. Oxtoby (1951) President of Pomona college

Principles of Modern Chemistry (7th ed., 2012), Ch. 1 : The Atom in Modern Chemistry

“There’s as many atoms in a single molecule of your DNA as there are stars in the typical galaxy. We are, each of us, a little universe.”

Neil deGrasse Tyson (1958) American astrophysicist and science communicator

Source: Cosmos

“As a result, there is an electrostatic attraction between the oxygen atom of one water molecule and the hydrogen of another (Fig. 2-lb), called a hydrogen bond.”

Albert L. Lehninger (1917–1986) American biochemist

Principles of Biochemistry, Ch. 2 : Water

“Life is not found in atoms or molecules or genes as such, but in organization; not in symbiosis but in synthesis.”

Edwin Grant Conklin (1863–1952) American biologist and zoologist

Edwin Grant Conklin, in: Evolution by Association : A History of Symbiosis: A History of Symbiosis http://books.google.co.in/books?id=wEo1QUkr7pUC&pg=PA129, Oxford University Press, 22 August 1994

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