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4200M1K_F11 - GLY4200C Name 90 points 18 took exam Numbers...

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1 GLY4200C Name 90 points September 21, 2011 18 took exam - Numbers to the left of the question number in red are the number of incorrect responses. Instructor comments are in blue . Florida Atlantic University MINERALOGY -- MIDTERM 1 EXAMINATION KEY True-False - Print the letter T or F in the blank to indicate if each of the following statements is true or false. Illegible answers are wrong. (1 point each) 3 T 1. 1.The nucleus of an atom is about 100,000 times smaller than the entire atom. 5 F 2. The size of a sodium metal atom (metallic radius) is smaller than of the sodium cation (ionic radius). 5 T 3. If one orbital contains two electrons, the "s" quantum number for these electrons cannot be the same. 2 F 4. Bohr's model correctly explained the line spectra of all elements known at the time. 0 F 5. Cations are atoms which have lost one or more electrons, and which are negatively charged. 8 T 6. The bonding in water (H 2 O) is more covalent than in sylvite (KCl). (Relevant electronegativities: Hydrogen, 2.1; Oxygen, 3.5: Potassium, 0.9; Chlorine, 2.9) 2 T 7. The dimensions of density are often expressed as g/cm3 in mineralogy, although the SI units are kg/m 3 . 6 F 8. The p subshell has m values of O, +1, or +2. Since l = 1, ml = 0, +1, or -1 1 T 9. The number of protons in the nucleus of an atom determines the type of element. 15 F 10. Ionically bonded substances are molecular, i.e. exhibit properties which may be explained in terms of interactions between molecules. Ionic bonds are non-directional, making the concept of molecule non-functional. 10 T 11. When a piezoelectric crystal is subjected to an electric current the crystal will physically deform. 1 F 12. Perfect cleavage in the British system is better than perfect cleavage in the American system.
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