Which takes place when a chemical change occurs? A: Bonds connecting atoms in products and reactants form.
B: Bonds connecting atoms in products and reactants break.
C: Bonds connecting atoms in reactants break, and bonds connecting atoms in products form.
D: Bonds connecting atoms in reactants form, and bonds connecting atoms in products break.

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.

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante

it is reliable if two scientists recorded it