Which of the following atoms is most likely to participate in an ionic bond?
A.) carbon, with an outer electron shell filled with four of a possible eight electrons
B.) chlorine, with an outer electron shell filled with seven of a possible eight electrons
C.) phosphorus, with an outer electron shell filled with five of a possible eight electrons
Ans: B.) chlorine, with an outer electron shell filled with seven of a possible eight electrons
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Which statement about microscopes is true?
a. Transmission electron microscopes show details of the internal structures of cells. b. Electron microscopes are best for viewing live cells because of high resolving power. c. Light microscopes require the use of stains which typically kill cells. d. Dissecting microscopes have a higher magnification than light microscopes.
Given the fact that their respiration rate increases rapidly during activity but is slow to decrease following activity, does it seem likely that scorpions chase their prey over long distances?
a. Yes b. No
Which of the following is true of AIDS?
a. It is equivalent to HIV. b. It is highly contagious. c. There is no cure for those afflicted. d. It is caused by a bacterium. e. It can be prevented by vaccination
The bubonic plague epidemic that swept through Europe between 1348 and 1350 A.D. was induced by a(n)
A) virus. B) prion. C) protozoan. D) bacterium. E) unidentified eukaryotic organism.