Which of the following is a method for separating a mixture a) using paper chromatography to separate pigments by density b) using decanting to pour liquid off a solid c) using electrolysis to separate oxygen and hydrogen from water molecules d) a and b e) all of the above

A) Using paper chromatography to separate pigments by density

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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