How high above the inner blue cone of the burner flame should the crucible be when the mg is heated?

In setting up your equipment in front of the fume hood to eliminate any vapors during the experiment. Use an iron ring stand with iron ring to back up the clay triangle to clasp the crucible and lid. Alter the height of the iron ring so the end of the crucible is about one centimeter above the inner blue cone of the strong flame.

the answer to your question is c

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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