ELECTRONCONTROLThe nucleus of every atom is surrounded by electrons.eOElectrondensityElectrondensityNatNatNataround atoms inaround atoms inSesodiumchlorineNatNatThe electron density around the nucleus of an atom in a pureelementis taken as the standard or normal situation.When an element reacts or combines with other elements, theelectrons around the nucleus of each atom are rearranged so thatthe atom either:(i) loses some control over the electrons in its outer shell comparedto the standard situation in the pure elementNa→Na+ + e-(ii) or gains some control over the electrons in its outer shellcompared to the standard situation in the pure element.16CI + e→CI-
16 ELECTRON CONTROL The nucleus of every atom is surrounded by electrons. The electron density around the nucleus of an atom in a pure element is taken as the standard or normal situation. When an element reacts or combines with other elements, the electrons around the nucleus of each atom are rearranged so that the atom either: (i) loses some control over the electrons in its outer shell compared to the standard situation in the pure element Na → Na+ + e－ (ii) or gains some control over the electrons in its outer shell compared to the standard situation in the pure element. Cl + e- → Cl－
Redox reactionsWordsWords and ExpressionsRedox: reduction-oxidation17
17 Redox reactions Words Redox: reduction-oxidation Words and Expressions