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The protoscience of chemistry, and alchemy, was unsuccessful in explaining the nature of matter and its transformations. However, by performing experiments and recording the results, alchemists set the stage for modern chemistry. The history of chemistry is intertwined with the history of thermodynamics, especially through the work of Willard ...
The four most common elements in living organisms – carbon, hydrogen, oxygen, and nitrogen – may be remembered with the acronym CHON . To remember the elements necessary for agriculture; C arbon, H ydrogen, Ca lcium, Iron ( Fe ), Magnesium ( Mg ), Manganese ( Mn ), Copper ( Cu ), Mo lybdenum, Chlorine ( Cl ), B oron.
The earliest chemistry sets were developed in the 18th century in England and Germany to teach chemistry to adults. In 1791, Description of a portable chest of chemistry : or, Complete collection of chemical tests for the use of chemists, physicians, mineralogists, metallurgists, scientific artists, manufacturers, farmers, and the cultivators ...
Atoms, elements, and ions [ edit] allobar - allotrope - alpha particle - alpha ray - anion - anode - atomic mass unit - atomic nucleus - atomic number - atomic theory - atomic weight - atom - beta particle - Brownian motion - calutron - cathode ray - cathode - cation - chemical change - chemical element - compound - deuterium - electric charge ...
In the Arrhenius model of reaction rates, activation energy is the minimum amount of energy that must be available to reactants for a chemical reaction to occur. [1] The activation energy ( Ea) of a reaction is measured in kilojoules per mole (kJ/mol) or kilocalories per mole (kcal/mol). [2] Activation energy can be thought of as the magnitude ...
Wynwood. Wynwood Walls: Outdoor museum dedicated to street art in an area going through major transformation. Museum of Graffiti: Offers a look at the history of the street mural and art movement ...
Open textbook. An open textbook is a textbook licensed under an open license, and made available online to be freely used by students, teachers and members of the public. Many open textbooks are distributed in either print, e-book, or audio formats that may be downloaded or purchased at little or no cost. [1]
Here is how the textbook looks like on the OLPC - Offline version of textbook for the OLPC. A program translates English textbook into all other languages - Textbook translated into all other wiki languages. If you have any questions regarding this textbook please do not hesitate to contact me. Arael2 20:53, 29 September 2007 (UTC)