You are a crime scene investigator who has been called to the scene of an apparent chemical attack. You are asked to determine what type of chemical agents are present. You have a full set of colorimetric tubes. Explain in detail the process of identifying the chemicals that are present by using the colorimetric tubes. Specifically include procedures for your self-protection in the chemical hazard zone.

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

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.