Which element is in group 9 and has an electron configuration that ends in the third energy level?

Which statement is best described as a atom

Explain what happens at the saturation point when adding salt to water at room temperature.

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.