Answer: If the electronegativity difference between the atoms is greater than 2.0, the bond is ionic. Ionic compounds are extremely polar molecules. Examples of polar molecules include: Water - H2O.
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The answer is Increased crop production.
to land on and explore the moon
B.
to orbit, rendezvous, and dock spacecraft
C.
to see if a man could survive in outer space and reenter the earth's atmosphere
D.
to test the effects of prolonged spaceflight on the human body