similarities between beryllium and Aluminium
Answers
Explanation:
* Aluminium hydroxide and beryllium hydroxide react with excess alkali to form their respective ions.
* Both these elements have the capacity to withstand the acid attack due to the presence of an oxide film on the surface of the metal.
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Beryllium (Be) shows resemblance with its diagonally opposite element Aluminium (Al).
Similarities are:
(1) Both metals have a tendency to form covalent compounds. Example: The chlorides of both being covalent are soluble in organic solvents.
(2) These two elements have same electronegativity and the polarising power i.e. charge/ radius ratio of their ions are very similar.
(3) Both BeCl2 and AlCl3 act as Lewis acid.
(4) Both metals dissolve in strong alkalies to form soluble complexes.
(5) The oxides of both Be(BeO) and Al(Al2O3) are hard, high melting insoluble solids.
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