These things are ignored when modelling metal-ligand complexes with the Kepert model. These things increase nucleophilicity of adjacent atoms in the alpha effect. Groups that cause (-5[1])positive mesomeric effects have a negative charge or one of these things. (-5[1])These things may cause unexpected stereochemistry in substitution reactions due to neighboring group participation. Borane cluster structure is predicted with a theory named for (*) skeletal types of these entities. Post-transition metals possess stable +2 oxidation states due to these entities being inert. (-5[1])These entities take on a higher s-character according to Bent’s rule. (-5[1])VSEPR (-5[1])attributes the bent shape of water to repulsion of hydrogens (10[1])by these entities. For 10 points, name these entities represented as two dots on a Lewis diagram. ■END■ (10[4]0[1])