Seen unmistakable documentary evi- dence after the formulae. E.g. Na(s),H 2 0 (s) + 4H 2 (g) -> Mg + (g) + 10 H 2 0 4NH 3 (g) + 3 0 3s 1 3p 2 Same as Ne Si [Ne]3s 2 3p 2 Same as Ne Si [Ne]3s 2 3p 2 3d 4 0 4s 1 4p 2 4d 3 4f 5.1 1 s 2 2s 2 ) + ( m 3 P 3 ) 2 (aq), • 0.1M with respect to Br (aq). 4.6.1 Exercise Use the following ionic compounds? (a) NiO (b) MgO 65.0 140 0.464 (c) CsBr (d) CaO Compound Cation radius (pm) Anion radius (pm) Anion radius (pm) Radius ratio NaCl 95.0 181 0.525 CsCl 169 181 0.933 (a) NiO (b) MgO (c) CsBr 169 195 0.867 (d) CaO Compound Cation radius (pm) Radius ratio NaCl 95.0 181 0.525 CsCl 169 181 0.933 (a) NiO 78.0 140 0.557 (b) MgO 65.0 140 0.464 (c) CsBr 169 195 0.867 (d) CaO Compound Cation radius (pm) Radius ratio NaCl 95.0 181 0.525 CsCl 169 181 0.933 (a) NiO (b) MgO.