Difficulty Quote by Paul Doughty Bartlett

The magnitude of the atomic weight determines the character of the element, just as the magnitude of the molecule determines the character of a…

— Dmitri Mendeleev

“Any of the components of an organism-say, a haemoglobin molecule-can be given an arbitrarily complete and precise description in the language of atomic physics…

— Paul Davies

Owing to the difficulty of dealing with substances of high molecular weight we are still a long way from having determined the chemical characteristics…

— Karl Landsteiner

Chemistry is one of those things: it's hard to nail down what it is or how you get it.

— Noah Centineo

“This irrelevance of molecular arrangements for macroscopic results has given rise to the tendency to confine physics and chemistry to the study of homogeneous…

— Walter M. Elsasser

But I must confess I am jealous of the term atom; for though it is very easy to talk of atoms, it is very…

— Michael Faraday

Probably our atomic weights merely represent a mean value around which the actual atomic weights of the atoms vary within certain narrow limits... when…

— William Crookes

Molecule, n.: The ultimate, indivisible unit of matter. It is distinguished from the corpuscle, also the ultimate, indivisible unit of matter, by a closer…

— Ambrose Bierce

An atom must be at least as complex as a grand piano.

— William Kingdon Clifford

The atoms may be compared to the letters of the alphabet, which can be put together into innumerable ways to form words. So the…

— William Henry Bragg

There are more potential combinations of DNA [physical forms] than there are atoms in the universe.

— Carl Sagan

Moreover, the abundance of chemical compounds and their importance in daily life hindered the chemist from investigating the question, in what does the individuality…

— Johannes Stark