Atoms of a given element will have the same mass. a: true b: false

False because atom of the same chemical elements do not have the same mass because number of proton in the nucleus is the same for all atoms of the same element but the neutron is not.

Explanation:

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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