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nonpolar molecule - traduction vers arabe
![In a molecule of [[boron trifluoride]], the trigonal planar arrangement of three polar bonds results in no overall dipole.](https://commons.wikimedia.org/wiki/Special:FilePath/Boron-trifluoride-elpot-3D-vdW.png?width=200 "In a molecule of [[boron trifluoride]], the trigonal planar arrangement of three polar bonds results in no overall dipole.")
![In [[methane]], the bonds are arranged symmetrically (in a tetrahedral arrangement) so there is no overall dipole.](https://commons.wikimedia.org/wiki/Special:FilePath/Methane-CRC-MW-3D-balls.png?width=200 "In [[methane]], the bonds are arranged symmetrically (in a tetrahedral arrangement) so there is no overall dipole.")
![This amphiphilic molecule has several polar groups ([[hydrophilic]], ''water-loving'') on the right side and a long nonpolar chain ([[lipophilic]], ''fat-loving'') at the left side. This gives it [[surfactant]] properties](https://commons.wikimedia.org/wiki/Special:FilePath/CHCA cleavable detergent.png?width=200 "This amphiphilic molecule has several polar groups ([[hydrophilic]], ''water-loving'') on the right side and a long nonpolar chain ([[lipophilic]], ''fat-loving'') at the left side. This gives it [[surfactant]] properties")
![A [[micelle]]{{snd}}the [[lipophilic]] ends of the surfactant molecules dissolve in the oil, while the [[hydrophilic]] charged ends remain outside in the water phase, shielding the rest of the [[hydrophobic]] micelle. In this way, the small oil droplet becomes water-soluble.](https://commons.wikimedia.org/wiki/Special:FilePath/Micelle scheme-en.svg?width=200 "A [[micelle]]{{snd}}the [[lipophilic]] ends of the surfactant molecules dissolve in the oil, while the [[hydrophilic]] charged ends remain outside in the water phase, shielding the rest of the [[hydrophobic]] micelle. In this way, the small oil droplet becomes water-soluble.")
![[[Phospholipid]]s are effective natural surfactants that have important biological functions](https://commons.wikimedia.org/wiki/Special:FilePath/Phospholipid schematic representation.png?width=200 "[[Phospholipid]]s are effective natural surfactants that have important biological functions")
![Cross section view of the structures that can be formed by [[phospholipid]]s. They can form a [[micelle]] and are vital in forming [[cell membrane]]s](https://commons.wikimedia.org/wiki/Special:FilePath/Phospholipids aqueous solution structures.svg?width=200 "Cross section view of the structures that can be formed by [[phospholipid]]s. They can form a [[micelle]] and are vital in forming [[cell membrane]]s")
Définition
Wikipédia
In chemistry, polarity is a separation of electric charge leading to a molecule or its chemical groups having an electric dipole moment, with a negatively charged end and a positively charged end.
Polar molecules must contain one or more polar bonds due to a difference in electronegativity between the bonded atoms. Molecules containing polar bonds have no molecular polarity if the bond dipoles cancel each other out by symmetry.
Polar molecules interact through dipole–dipole intermolecular forces and hydrogen bonds. Polarity underlies a number of physical properties including surface tension, solubility, and melting and boiling points.
