A medallion was dropped into 20.0 mL of water. The water level rose to 25.3 mL. What is the volume of the medallion? (Vobj = Vf - Vi)

5.3 mL

Explanation:

We solve this problem using Archimede's principle, which states that the volume displaced by a submerged object is equal to the volume of the object.

With that in mind we calculate the volume of water displaced by the medallion:

As the medallion displaced 5.3 mL of water when submerged, the volume of the medallion is also 5.3 mL.

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.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.