The elements, if arranged according to their atomic…

When the elements are arranged in vertical columns according to increasing atomic weight, so that the horizontal lines contain analogous elements again according to…

— Dmitri Mendeleev

If all the elements are arranged in the order of their atomic weights, a periodic repetition of properties is obtained. This is expressed by…

— Dmitri Mendeleev

The elements which are the most widely diffused have small atomic weights.

— Dmitri Mendeleev

Certain characteristic properties of elements can be foretold from their atomic weights.

— Dmitri Mendeleev

Elements which are similar as regards their chemical properties have atomic weights which are either of nearly the same value (eg. Pt, Ir, Os)…

— Dmitri Mendeleev

Childhood is a complex dialectical process characterized by periodicity, unevenness in the development of different functions, metamorphosis or qualitative transformation of one form into…

— Lev S. Vygotsky

In nature nothing is at standstill, everything pulsates, appears and disappears. Heart, breath, digestion, sleep and waking - birth and death - everything comes…

— Sri Nisargadatta Maharaj

This priesthood became a closed group, able to control enormous wealth and incomes, and concerned very largely with the study of the solar and…

— Carroll Quigley

The modesty of women, which, in its most primitive form among animals, is based on sexual periodicity, is, with that periodicity, an essential condition…

— Havelock Ellis

If life is not always poetical, it is at least metrical. Periodicity rules over the mental experience of man, according to the path of…

— Alice Meynell

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

Experimental work of great refinement is necessary in order to determine atomic weights. No relationships between them have yet been certainly found which make…

— Theodore William Richards

[This] may prove to be the beginning of some embracing generalization, which will throw light, not only on radioactive processes, but on elements in…

— Frederick Soddy

If our inconceivably ancient universe even had any beginning, the conditions determining that beginning must even now be engraved in the atomic weights.

— Theodore William Richards

There is only one party in the United States, the Property Party...and it has two right wings: Republican and Democrat. Republicans are a bit…

— Gore Vidal