DNA | Definition, Discovery, Function, Bases, Facts, & Structure
Deoxyribonucleic acid (DNA) is an organic chemical that contains genetic information and instructions for protein synthesis. It is found in most cells of every organism.
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
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.
Periodic table | Definition, Elements, Names, Symbols, Groups,
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
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
Air | Composition, Oxygen, Nitrogen | Britannica
Key People: Carl von Linde Henry Cavendish Robert Boyle Anaximenes Of Miletus Ctesibius Of Alexandria (Show more) Related Topics: chemical element atmosphere air-cushion
Chemical synthesis | Organic & Inorganic Reactions | Britannica
Chemical compounds are made up of atoms of different elements, joined together by chemical bonds. A chemical synthesis usually involves the breaking of existing bonds and the formation of new ones.
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?
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.
Chemical element | Definition, Origins, Distribution, & Facts | Britannica
A chemical element is any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is