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Explain why the first ionization energy of sodium is less than that of magnesium?

Cu2+ (aq) reacts with ammonia to form the complex ion [Cu(NH)3)4]2+. Explain this reaction in terms of acid-base theory, and outline the bonding in the complex formed between Cu2+ and NH3

a) Describe the nature of ionic bonding. b) State the electron configuration of the Ca (II) ion. c) Outlie why solid calcium is a good conductor of electricity.

Explain why transition metal complexes are coloured?

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