If an atom is located in the 3rd period, which of the following is true: a. it will have 2 energy levels. b. it will have 3 energy levels. c. it can hold a maximum of 8 electrons in the third energy level d. it can hold a maximum of 18 electrons in the second energy level e. it will be in the same row as magnesium

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.

i think its 5049.

i hope this !