Which are closer together: the two nuclei within potassium fluoride, KF, or the two nuclei within molecular fluorine, F2?
A. KF
B. F2
C. Both are the same. Any atom bonded to F will have the same internuclear separation.
D. It makes little sense to compare two molecules which exist in different physical states. KF is a solid, while F2 is a gas.
Answer: B
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• A potassium-argon date of 2.3 million years on potassium feldspar in a volcanic rock • A potassium-argon date of 535 million years on potassium feldspar in a metamorphosed volcanic rock • A potassium-argon date of 164 million years on potassium feldspar in a clastic sedimentary rock What will be an ideal response?
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a. True b. False Indicate whether the statement is true or false
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Which of the following is most closely associated with the compression of air in coastline rocks?
A) Abrasion B) Growth of salt crystals C) Hydraulic pounding D) Pneumatic action E) Coral reef formation