Dec 16, 2025 · All the matter in the universe is composed of the atoms of more than 100 different chemical elements, which are found both in pure form and combined in chemical compounds.

Dow Inc. (formerly Dow Chemical Company) is an American chemical and plastics manufacturer that is one of the world’s leading suppliers of chemicals, plastics, and sealants.

Dec 26, 2025 · Cooking, fermentation, glass making, and metallurgy are all chemical processes that date from the beginnings of civilization. Today, vinyl, Teflon, liquid crystals, semiconductors, and …

Dec 12, 2025 · This article covers the major groups and explains how these molecules function as energy-storage molecules, chemical messengers, and structural components of cells.

Dec 9, 2025 · This article begins by describing the historical evolution of the current understanding of chemical bonding and then discusses how modern theories of the formation of chemical bonds have …

Dec 4, 2025 · sodium (Na), chemical element of the alkali metal group (Group 1 [Ia]) of the periodic table. Sodium is a very soft silvery-white metal. Sodium is the most common alkali metal and the …

Dec 16, 2025 · Chemical compound - Elements, Molecules, Reactions: Chemical compounds may be classified according to several different criteria. One common method is based on the specific …

Compounds can be broken down into their constituents to various degrees or changed into new compounds by chemical reactions. Atoms always combine into molecules in fixed proportions, …

Dec 29, 2025 · This article describes the molecular structure of water as well as its physical and chemical properties. For other major treatments of water, see climate; environmental works; …

Dec 29, 2025 · Water undergoes various types of chemical reactions. One of the most important chemical properties of water is its ability to behave as both an acid (a proton donor) and a base (a …