HF (hydrogen fluoride) becomes a gas at a higher temperature than does HC1 (hydrogen chloride). This is inconsistent with the trend where the boiling point increases when moving down a group on the periodic table.
Explain the reason for this inconsistent behavior.
A)
the hydrogen bonds present in HF
B)
the hydrogen bonds present in HCL
the electropositive nature of fluorine
D)
the higher electronegativity of chlorine

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.

the answer is c.the valence of the atoms combine .