Water is known as the universal solvent. one reason water makes a good solvent is because it is composed of polar molecules. what makes a water molecule a polar molecule? a. the water molecule never develops a charge and is always neutral. water molecules are rod-shaped. b. the water molecule has a negative charge at cold temperatures. c. water molecules have a positive charge on one end and a negative charge on the other.

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.