Our current understanding of evolution is called a theory because it has been supported repeatedly as new discoveries have been made
proven to be exactly true as originally proposed
corroborated by data that were gathered during a single experiment
developed from the postulates of many scientists

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.