The table shows the mass and density of some substances. Density of Substances Mass (g) Density of Iron (g/cm3) Density of Silver (g/cm3) 100 7.8 19.3 200 P Q Part 1: Is the value of Q less than, greater than, or equal to the value of P? Part 2: Explain your answer for Part 1.

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.

if it's not useful, feel free to report for mistake in answer.