classifying
91Timeline of chemical elements discoveries — The discovery of the elements known to exist today is presented here in chronological order. The elements are listed generally in the order in which each was first defined as the pure element,[clarification needed] as the exact date of discovery… …
92Ecology — For other uses, see Ecology (disambiguation). Ecology …
93Mathematical model — Not to be confused with the same term that is used in model theory, a branch of mathematical logic. An artifact that is used to illustrate a mathematical idea may also be called a mathematical model, the usage of which is the reverse of the sense …
94Morphology (linguistics) — For other uses, see Morphology. Linguistics …
95Nostratic languages — Nostratic (controversial) Geographic distribution: Europe, Asia except for the southeast, North and Northeast Africa, the Arctic Linguistic classification: Borean (?) …
96Periodic table — This article is about the periodic table of the elements . For other uses, see The Periodic Table. The periodic table of the chemical elements (also known as the periodic table or periodic table of the elements) is a tabular display of the 118… …
97Russia — This article is about the current country. For other uses, see Russia (disambiguation). Russian Federation Российская Федерация Rossiyskaya Federatsiya …
98Uyghur people — Uyghur ئۇيغۇر 维吾尔族 Young Uyghur woman, c. 2005 Regions with significant populations …
99Volcano — This article is about the geological feature. For other uses, see Volcano (disambiguation) …
100Group theory — is a mathematical discipline, the part of abstract algebra that studies the algebraic structures known as groups. The development of group theory sprang from three main sources: number theory, theory of algebraic equations, and geometry. The… …
