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Hw6-Int-Periodic Trends

Hw6-Int-Periodic Trends - Exercise Set 6 PERIODIC TRENDS...

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Exercise Set 6 PERIODIC TRENDS CHM 1025 Hw6-Int-Periodic Trends.wpd General Periodicity 1. Estimate the missing boiling point in each of the following series of compounds: 4 4 4 4 a) SiH , -112°C; GeH , -90°C; CH , -164°C; SnH , ? °C 3 4 2 3 3 b) PH , -88°C; GeH , -90°C; H Se , -42°C; SbH , -17°C; AsH , ? °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
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