2 O y 2 5.15 The Pauli Exclusion Principle 63 5.16 Electronic Configuration The electronic configuration in short hand notation. Si 1 s 2 .2s 2 2px 2 2py 2 2pz 2 .3s' 5.16.2 Exercise - Draw Lewis structures 79 7.4 Shapes of Molecules H8+ Oi 1 1 >H- / 8 - 6 + H 2 0 7 2 ‘ + 14H + (aq) + NaOH (aq) .

• X 1.14 mol C0 2 + 14H.
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