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Electrophilic addition. The overall reaction for electrophilic addition to ethylene. In organic chemistry, an electrophilic addition ( AE) reaction is an addition reaction where a chemical compound containing a double or triple bond has a π bond broken, with the formation of two new σ bonds. [1]
Dipole. The magnetic field of a sphere with a north magnetic pole at the top and a south magnetic pole at the bottom. By comparison, Earth has a south magnetic pole near its north geographic pole and a north magnetic pole near its South Pole. In physics, a dipole (from Ancient Greek δίς (dís) 'twice', and πόλος (pólos) 'axis') [1] [2 ...
Selected subspecies Abax parallelepipedus ssp. alpigradus; Abax parallelepipedus ssp. audouini; Abax parallelepipedus ssp. contractus; Abax parallelepipedus ssp. curtulus; Abax parallelepipedus ssp. germanus
The periodic table, also known as the periodic table of the elements, is an ordered arrangement of the chemical elements into rows ("periods") and columns ("groups"). It is an icon of chemistry and is widely used in physics and other sciences.
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War Cross. Prince Philip, Duke of Edinburgh (born Prince Philip of Greece and Denmark, [1] later Philip Mountbatten; 10 June 1921 [fn 1] – 9 April 2021), was the husband of Queen Elizabeth II. As such, he was the consort of the British monarch from his wife's accession on 6 February 1952 until his death in 2021, making him the longest-serving ...
History of electrochemistry. Electrochemistry, a branch of chemistry, went through several changes during its evolution from early principles related to magnets in the early 16th and 17th centuries, to complex theories involving conductivity, electric charge and mathematical methods. The term electrochemistry was used to describe electrical ...