WebMar 18, 2024 · Noun [ change] a diagram of a chemical ( countable & uncountable) A chemical is a basic substance that is used in or produced by mixing elements or other chemicals. When you burn plastics, you put dangerous chemicals into the air. The chemical industry in China is producing more and more useful paints, glues, and other products. … Webnoun, plural chem·is·tries. the science that deals with the composition and properties of substances and various elementary forms of matter.Compare element (def. 2). chemical …
Chemistry definition and meaning Collins English Dictionary
Webchemistry noun [U] (SCIENCE) the scientific study of the basic characteristics of substances and the ways in which they react or combine 化学 She studied chemistry and physics at college. 她在大学学的是化学和物理。 a chemistry department / laboratory 化学系/实验室 … Webchemistry. noun. /ˈkemɪstri/. /ˈkemɪstri/. [uncountable] the scientific study of the structure of substances, how they react when combined or in contact with one another, and how … kinship hardware
chemical - Wiktionary
WebMay 6, 2024 · (chemistry) Any of several classes of compound having the following properties:- Caustic noun Caustic soda. Acid noun Any of a class of water-soluble compounds, having sour taste, that turn blue litmus red, and react with some metals to liberate hydrogen, and with bases to form salts. Caustic adjective WebThe valence of an atom is the ability of that atom, expressed in numbers, to combine or interact with another atom, depending on the number of electrons available for bonding in the atom’s outer shell, called the valence shell. WebChemical-structure definition: (chemistry) The arrangement of chemical bonds between atoms in a molecule (in an ion or radical with multiple atoms), specifically which atoms are chemically bonded to what other atoms with what kind of chemical bond, together with any information on the geometric shape of the molecule needed to uniquely identify ... kinship health services