H2 (g) + F2(g) à 2HF (g) + 536 KJ which of the following statements is correct? A.536 KJ are absorbed in an exothermic reaction.
B. 536 KJ are released in an exothermic reaction
C. 536 KJ are released in an endothermic reaction
D.536 KJ are absorbed in an endothermic reaction.

the answer is c i believe

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; 4 electrons;