1 2 3 Why is it better to use the metric system, rather than the English system, in scientific measurement? O The English system uses one unit for each category of measurement. O The metric system uses one unit for each category of measurement. O The English system uses consistent fractions that are multiples of 10. O The metric system utilizes a variety of number conversions.

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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