Meteor Crater is a place that has provided scientists with rocks that have helped them determine the age of the Earth. What are other things scientists have been able to use to help the age the Earth? Zircon from Australia Other Meteorite locations Moon Rocks Aquatic fossils found on Mt. Everest

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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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