ron (Fe): [Ar]4s23d6 core electrons valence electrons

Core electrons - 18 (from [Ar])Valence electrons - 8 (from 4s² 3d⁶)For Iron (Fe) with atomic number 26, its electron configuration is (Fe: [Ar] 4s² 3ds)Core ElectronsCore electrons are the electrons in the inner shells, not involved in bonding.Iron’s core electrons are the electrons in [Ar], which accounts for the first 18 electrons.So, core electrons = 18Valence ElectronsValence electrons are in the outermost shell and are involved in bonding.For transition metals like iron, both 4s and 3d electrons can act as valence electrons.Iron has 4s² 3d⁶, so Valence electrons = 2 (from 4s) + 6 (from 3d) = 8 valence electrons

Answered by CloudyClothy | 2025-05-24