Question

why do halides and hydrides of beryllium polymerise?
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Answer 1

Answer:

All halides of Be are covalent and electron deficient. Because of this, they are unstable. So, in order to attain stability they polymerise to make long chains. They do this by forming coordinate bonds (dative covalent bonds) between lone pairs on halide atoms and adjacent beryllium atoms.Jan 9, 2018