The two sentences contradictory statements in the key are called- A. Coupling
B. Couples
C. Couplets

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.

What is the most common form of matter in the universe

Are the results of a thoroughly tested hypothesis?