1. Which is the smallest unit: 500 cm , 5000 mm, 4 m 2.Which is the smallest unit: 0.2 L, 240 mL, 50 cL

3.Which is the smallest unit: 3000 mg, 250 cg, 3 kg

4.Which is the smallest unit: 4 L, 5000 mL, 23,000 cL

5.Which is the smallest unit: 17 m, 17,040,000 cm, 17, 400,000,005 mm

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.

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter