Web1 any substance used in or resulting from a reaction involving changes to atoms or molecules. adj. 2 of or used in chemistry. chemical balance. 3 of, made from, or using chemicals. chemical fertilizer. ♦ chemically adv. chemical bond. n a mutual attraction between two atoms resulting from a redistribution of their outer electrons. WebDec 8, 2024 · A chemical incident is the uncontrolled release of a toxic substance, potentially resulting in harm to public health and the environment. Chemical incidents …
Photochemistry - Wikipedia
WebApr 12, 2024 · PCBs are a group of man-made organic chemicals consisting of carbon, hydrogen and chlorine atoms. The number of chlorine atoms and their location in a PCB … Webelectrochemical reaction, any process either caused or accompanied by the passage of an electric current and involving in most cases the transfer of electrons between two substances—one a solid and the other a liquid. Under ordinary conditions, the occurrence of a chemical reaction is accompanied by the liberation or absorption of heat and ... haus in tettau 01945 kaufen
Systemic Effect - an overview ScienceDirect Topics
Webisotope, one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly identical chemical behaviour but with different atomic masses and … Webadjective. chem· i· cal ˈke-mi-kəl. 1. : of, relating to, used in, or produced by chemistry or the phenomena of chemistry. chemical reactions. 2. a. : acting or operated or produced by chemicals. a chemical fire extinguisher. WebPhotochemistry is the branch of chemistry concerned with the chemical effects of light. Generally, this term is used to describe a chemical reaction caused by absorption of ultraviolet (wavelength from 100 to 400 nm), … haus in pula sardinien kaufen