Draw a faint pencil line around 1 cm from the bottom edge of the silica gel plate. Using a fresh spotter for each sample apply each of the five solutions to evenly spaced points on this line aiming to prepare a colored spot of material no more than 3 mm in diameter. Allow the application solvent to evaporate for a few moments, leaving five small colored spots.

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.

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.      

answer:

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