Which of the following statements is true?
A. The electron-dot structure is made up of each of the valence shells.
B. Not all of the electrons in the valence shell are valence electrons.
C. The valence shell always gives us the electron-dot structure.
D. The valence shell is usually the most unreactive shell.
E. none of the above
Answer: B
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What element is oxidized in the following equation and what element is reduced? Sn2+ + 2 Ag ? Sn + 2 Ag?
A. The tin ion, Sn2+, is reduced, while the silver, Ag, is oxidized. B. Both the tin ion, Sn2+, and the silver, Ag, are oxidized. C. Both the tin ion, Sn2+, and the silver, Ag, are reduced. D. The tin ion, Sn2+, is oxidized, while the silver, Ag, is reduced.
All chordates are vertebrates
a. True b. False
In general, more moderate temperature patterns
A) are created by continentality. B) are exemplified by Winnipeg and Wichita. C) indicate maritime influences. D) occur in continental interiors.
It has been deduced that the mantle is composed of ________ sublayers of various composition and density
A) 3 B) 9 C) 27 D) 51 E) 153