How did the work of Dmitri Mendeleev differ from that of John Newlands in the development of the periodic table?

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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answer; capital earns interest; entrepreneurship receives a profit or incurs a loss;