Hw6-G1-Periodicity

Hw6-G1-Periodicity - Exercise Set 6 PERIODIC TRENDS CHM 2045

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Exercise Set 6 PERIODIC TRENDS CHM 2045 Hw6-G1-Periodicity.wpd General Periodicity 1. Estimate the missing boiling point in each of the following series of compounds: a) SiH 4 , -112 / C; GeH 4 , -90 / C; CH 4 , -164 / C; SnH 4 , ? / C b) PH 3 , -88 / C; GeH 4 , -90 / C; H 2 Se , -42 / C; SbH 3 , -17 / C; AsH 3 , ? / C 2. Element 53 has an atomic mass of 126.9045 g/mole, whereas element 52 has an atomic mass of 127.60 g/mole. What kind of information must have led chemists to place tellurium before iodine in the periodic table? Atomic (Covalent) Radius 3. How and why do atomic radii change as we move from left to right across a period in the periodic table? From bottom to top within a group? 4. Which member of each of the following pairs would be predicted to have the larger atomic (covalent) radius? a) Si or S b) Si or Sn c) Si or Ga d) Si or Al e) Si or Mg f) Si or F g) Si or C h) Sr or Sb i) K or Mg j) P or Ge k) Al or Cl l) P or O m) Cl or I 5. Arrange each of the following series in order of decreasing atomic radii (largest first): a) Na, Be, Mg b) Se, S, As c) Ar, H, Ba, Te, Au, Ag d) K, Ca, Rb, Ti, Br, Cl Ionization Energy 6. Write equations that show the processes corresponding to the first, second, and third ionization energies of a scandium atom. 7.

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This note was uploaded on 11/16/2011 for the course CHM 2045 taught by Professor Mitchell during the Fall '07 term at University of Florida.

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Hw6-G1-Periodicity - Exercise Set 6 PERIODIC TRENDS CHM 2045

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