Which ion achieves a stable octet configuration by losing electrons, resulting in a +3 charge?
Aluminum (Al) has [Ne] 3s² 3p¹ . Losing 3 electrons forms Al³⁺ with [Ne] , a noble gas configuration.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Ionic Bonding - Lattice Enthalpy and Properties of Ionic Compounds