The noble gases, or group 18, on the periodic table are known to be unreactive. Which of the following reason best describes why this family is so inert? Their outer shells are full, they can't hold any more electrons.

Their outer shells need one electron to be full.

Their outer shells have 2 electrons.

Their outer shells have 1 electron.

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.