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Periodic trends & Bonding (Ch 12 &13)

Periodic trends & Bonding (Ch 12 &13). 1. Fill in the following table:. Periodic trends & Bonding (Ch 12 &13). 2. Put the following in order of: a. increasing atomic size Si Ca Ge b. increasing ionic radius Cl - Ca 2+ Ar

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Periodic trends & Bonding (Ch 12 &13)

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  1. Periodic trends & Bonding (Ch 12 &13) 1. Fill in the following table:

  2. Periodic trends & Bonding (Ch 12 &13) 2. Put the following in order of: a. increasing atomic size Si Ca Ge b. increasing ionic radius Cl- Ca2+ Ar c. increasing ionization energy C N O d. least to most exothermic electron affinity C Si In e. increasing electronegativity C F Cl f. increasing polarity C-N C-O C-C

  3. Periodic trends & Bonding (Ch 12 &13) 3. The successive ionization energies for an unknown element are shown below. IE1 = 580 kJ/mol IE2 = 1815 kJ/mol IE3 = 2740 kJ/mol IE4 = 11,600 kJ/mol To which family in the periodic table does the unknown element most likely belong?

  4. Periodic trends & Bonding (Ch 12 &13) 4. Draw Lewis Structures for the following. Show resonance where applicable. a. H2O b. NCl3 c. HCN (carbon is central atom) d. N2 e. CO2 f. NO3–

  5. Periodic trends & Bonding (Ch 12 &13) 5. Draw two Lewis structures for the following molecules, one that obeys the octet rule and one that minimizes formal charge: a. BeF2 b. POCl3 c. BF3 d. SO42-

  6. Periodic trends & Bonding (Ch 12 &13) 6. Given the following bond lengths, estimate bond lengths for the following ions: N-O 147 pm N=O 115 pm a. NO- b. NO+ c. NO2-

  7. Periodic trends & Bonding (Ch 12 &13) 7. Use the table of bond energies to estimate ∆H for the following reactions: Bond Bond Energy (kJ/mol) Bond Bond Energy (kJ/mol) H-H 432 C-H 413 H-Cl 427 O-H 467 C-Cl 339 N-H 391 O-O 146 N-N 160 O=O 495 N=N 418 C=O 745 N≡N 941 Cl-Cl 239 a. 2H2 + O2 → 2 H2O b. 2NH3 → N2 + 3H2 c. CH4 + Cl2 → CH3Cl + HCl

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