What does it mean for an element to be oxidized?

Balance this equation co2(g) + h2o (g) show that the balanced equation obeys the law if conversation of mass

In salt water solution,the salt is the blank

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.