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Periodic Videos (also known as The Periodic Table of Videos) is a video project and YouTube channel on chemistry. It consists of a series of videos about chemical elements and the periodic table , with additional videos on other topics in chemistry and related fields.
A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics.
Like the periodic table, the list below organizes the elements by the number of protons in their atoms; it can also be organized by other properties, such as atomic weight, density, and electronegativity. For more detailed information about the origins of element names, see List of chemical element name etymologies.
Chemistry is the scientific study of the properties and behavior of matter. [1] It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances.
This is an index of lists of molecules (i.e. by year, number of atoms, etc.). Millions of molecules have existed in the universe since before the formation of Earth. Three of them, carbon dioxide, water and oxygen were necessary for the growth of life.
Chemical formula Synonyms CAS number; C 10 Cl 10: dienochlor: 2227-17-0 C 10 Cl 10 O: kepone: 143-50-0 C 10 F 8: perfluoronaphthalene: 313-72-4 C 10 F 14 O: perfluoroadamantanone: 141635-73-6 C 10 F 18 ...
A compound's empirical formula is a very simple type of chemical formula. [27] It is the simplest integer ratio of the chemical elements that constitute it. [28] For example, water is always composed of a 2:1 ratio of hydrogen to oxygen atoms, and ethanol (ethyl alcohol) is
Several compounds – C 5 H 11 NO 2: amyl nitrite: 110-46-3 C 5 H 11 NO 2: amyl nitrite: 463-04-7 C 5 H 11 NO 2: butyl carbamate: 592-35-8 C 5 H 11 NO 2: iso butyl carbamate: 543-28-2 C 5 H 11 NO 2: valine: 72-18-4 C 5 H 11 NO 2 S: methionine: 59-51-8 C 5 H 11 NO 2 S: penicillamine: 52-67-5 C 5 H 11 NO 4: ammonium acid pyrotartrate: 61478-85-1 ...