The key effect for perchlorate is its ability to competitively inhibit uptake of iodide by the thyroid gland, potentially causing hypothyroidism. The Committee selected a critical effect size of 50% inhibition of iodide uptake from a clinical study in healthy adults as the benchmark response, as data from healthy adults following both short-term and chronic exposure to perchlorate have shown ... Answers MULTIPLE-CHOICE QUESTIONS 1. A Bonds formed from elements with greater differences in electronegativity are most likely ionic in nature. (Electronegativity increases for elements as you move up and to the right on the periodic table.) (Chemistry 8th ed. pages 350—351/9th ed. pages 361-362). LO 2.17 2.

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    4.1.3 The lattice structure is represented by the smallest ratio of cation:anion, which is the formula unit of the substance - Be able to deduce the formula unit and name of ionic compounds made of two elements and with polyatomic ions.

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    The sulfate anion in the FPS series does not bond directly to the aluminophosphate network, decreasing connectivity and increasing the ionicity of the FPS glasses. The increased degrees of freedom imparted by the sulfate are evident in the single‐alkali FPS glasses, which have lower E a , hardness, shear moduli, and Young's moduli, and higher ...

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