|
|
Chemical compound | Definition, Examples, & Types | Britannica
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.
Chemistry | Definition, Topics, Types, History, & Facts | Britannica
Cooking, fermentation, glass making, and metallurgy are all chemical processes that date from the beginnings of civilization. Today, vinyl, Teflon, liquid crystals, semiconductors, and superconductors represent the fruits of chemical technology.
Gold | Facts, Properties, & Uses | Britannica
gold (Au), chemical element, a dense lustrous yellow precious metal of Group 11 (Ib), Period 6, of the periodic table of the elements. Gold has several qualities that have made it exceptionally valuable throughout history.
Caffeine | Stimulant, Health Benefits, Addiction | Britannica
Caffeine, nitrogenous organic compound of the alkaloid group, substances that have marked physiological effects. Caffeine occurs in tea, coffee, guarana, maté, kola nuts, and cacao. Pure caffeine (trimethylxanthine) occurs as a white powder or as silky needles, which melt at 238 °C (460 °F); it
Cellular respiration | Definition, Equation, Cycle, Process, Reactants ...
Cellular respiration, the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities and discarding, as waste products, carbon dioxide and water.
Periodic table | Definition, Elements, Names, Symbols, Groups, Charges ...
Periodic table, in chemistry, is an organized array of all the chemical elements in order of increasing atomic number. When the elements are thus arranged, there is a recurring pattern in which elements in the same column (group) have similar properties.
Nitric oxide | Uses, Facts, & Definition | Britannica
Nitric oxide, colourless toxic gas that has important chemical signaling functions in animals and is a serious air pollutant.
DNA | Definition, Discovery, Function, Bases, Facts, & Structure ...
DNA is an organic chemical of complex molecular structure found in all prokaryotic and eukaryotic cells. It codes genetic information for the transmission of inherited traits.
Lipid | Definition, Structure, Examples, Functions, Types, & Facts ...
This section describes the structure and physical and chemical properties of fatty acids. It also explains how living organisms obtain fatty acids, both from their diets and through metabolic breakdown of stored fats.
Lead | Definition, Uses, Properties, & Facts | Britannica
What is lead as a chemical element? What does lead look like and what is its symbol on the periodic table? Where is lead found in nature? What are some uses of lead in everyday life?
|
FIRE101 Fire Jobs 