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Substituting a fluorine into a para position, however, protects the aromatic ring and prevents the epoxide from being produced. [13] Adding fluorine to biologically active organic compounds increases their lipophilicity (ability to dissolve in fats), because the carbon–fluorine bond is even more hydrophobic than the carbon–hydrogen bond.
And any created fluorine within stars is rapidly eliminated through strong nuclear fusion reactions—either with hydrogen to form oxygen and helium, or with helium to make neon and hydrogen. [ 2 ] [ 3 ] The presence of fluorine at all—outside of temporary existence in stars—is somewhat of a mystery because of the need to escape these ...
Fluorine is a chemical element; it has symbol F and atomic number 9. It is the lightest halogen [note 1] and exists at standard conditions as pale yellow diatomic gas. Fluorine is extremely reactive as it reacts with all other elements except for the light inert gases. It is highly toxic.
The fluorine–fluorine bond of the difluorine molecule is relatively weak when compared to the bonds of heavier dihalogen molecules. The bond energy is significantly weaker than those of Cl 2 or Br 2 molecules and similar to the easily cleaved oxygen–oxygen bonds of peroxides or nitrogen–nitrogen bonds of hydrazines. [8]
Taasir Delhi, Ranchi, Patna, Muzaffarpur editions are RNI-certified circulations.. Central Bureau of Communication https://cbcindia.gov.in/ (Under Ministry of Information & Broadcasting, Government of India), erstwhile DAVP, has already empanelled Delhi, Ranchi, Patna, Muzaffarpur, Howrah, Chennai, Bangalore, Guwahati, Mumbai, Bhagalpur, Gangtok, and Bhopal editions of Taasir and has fixed ...
Moissan's fluorine cell, from his 1887 publication. Fluorine is a relatively new element in human applications. In ancient times, only minor uses of fluorine-containing minerals existed. The industrial use of fluorite, fluorine's source mineral, was first described by early scientist Georgius Agricola in the 16th century, in the context of ...
Fluorine is an important element for biological systems. From a mammalian health perspective, it is notable as a component of fluorapatite, a key mineral in the teeth of humans that have been exposed to fluorine, as well as shark and fish teeth. [4]
Pakistan studies curriculum (Urdu: مطالعہ پاکستان Muṭāla-e-Pākistān) is the name [1] [2] of a curriculum of academic research and study that encompasses the culture, demographics, geography, history, International Relations and politics of Pakistan.