ExamIQuizquestions-answers - Class: Session: quiz1-jan14 1....

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Class: BSC-114-SPR-2009 Session: quiz1-jan14 1. In the term trace element, the modifier trace means: A. The element is required in very small amounts     B. The element can be used to trace atoms through an organism’s metabolism C. The element is very rare on Earth D. The element passes rapidly through the organism 2. Which are the four most abundant elements in living systems: A. Hydrogen, oxygen, calcium, and nitrogen B. Magnesium, calcium, iron, and zinc C. Hydrogen, oxygen, nitrogen, and carbon       D. Hydrogen, oxygen, nitrogen, and carbon dioxide  3. The number of protons in an uncharged atom: A. Equals the number of neutrons B. Equals the number of electrons     C. Varies with the different isotopes D. Defines its mass number  4. Electrons are shared equally by atoms in which type of bond: A. Polar covalent B. Non-polar covalent     C. ionic D. hydrogen  Session: quiz2-jan16 1. The reactivity of an atom arises from: A. The existence of unpaired electrons in the valence shell B. The sum of all the potential energies of all the electron shells C. The potential energy of the valence shell D. The distance of the valence shell from the nucleus
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2. The Brackets indicate a: A. Non-polar covalent bond B. Polar covalent bond C. Ionic bond D. Hydrogen bond      3. In table salt, what is the nature of the bond between sodium and chlorine:
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This note was uploaded on 04/07/2009 for the course BSC 114 taught by Professor Staff during the Spring '08 term at Alabama.

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ExamIQuizquestions-answers - Class: Session: quiz1-jan14 1....

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