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Quiz 1 soln 4 - Ceramic Structures[24 points 3a Which one...

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Unformatted text preview: Ceramic Structures [24 points] 3a.) Which one of the following statements is true? i.) A cation gets larger as the charge on it increases ii.) A cation gets smaller as the charge on it increases iii.) A cation remains the same size whatever the charge iv.) There is no relationship between a cation’s size and its charge Answer (circle one) i.) iii.) iv.) b.) A F renkel defect in an ionic crystal consists of: i.) an anion vacancy and a cation vacancy ii.) an anion vacancy and an anion interstitial iii.) a cation vacancy and a cation interstitial iv.) an anion interstitial and a cation interstitial Answer (circle one) i.) ii.) iv.) 0.) The greater the difference in electronegativity between two elements, the greater the tendency to form: i.) an ionic bond ii.) a metallic bond iii.) a covalent bond iv.) a van der Waals bond Answer (circle one) @ ii.) iii.) iv.) d.) Given that the electronegativies of Zn and S are 1.6 and 2.5 respectively, calculate the degree of covalency of the Zn—S bond. 'AI ‘- [J — 2x? (-015) (X‘s-7(3)...) u too °AC ‘ l ‘17»: '- [erg ('0'1Y3(Xn'7£¢)1’\x \00 "/o C [sz (—04.3) (Md-W'L \oo % C = X as? (‘ 0-25) (0“)‘1 It \00 X, C '— L up ('04.!) {0-803 % ‘00 % C -. [ u? (voaoufle mo = M Z —— ‘! Answer:...........%’. ..C... 1 8‘667' .. ...
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