Hace 18 mil millones de años, el Ylem (A) estalló, expandiéndose y formándose las moléculas de hidrógeno y helio (B), que dieron origen después a las estrellas y galaxias, que siguen, a su vez, alejándose una de otras (C).

Which element is least likely to undergo a chemical reaction

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.

When the mercury level in a barometer decreases that atmospheric pressure has