EXERCISES

Write the resonance structures for ${\mathrm{NO}}_2$.

Write the resonance structures for ${{\mathrm{NO}}^{-}}_3$.

Use Lewis symbols to show electron transfer between the following atoms to form cations and anions :

$\mathrm{Ca}$ and $\mathrm{O}$

Use Lewis symbols to show electron transfer between the following atoms to form cation and anion: 

$\mathrm{Al}$ and $\mathrm{N}$

Which hybrid orbitals are used by carbon atoms in the following molecule? 

${\mathrm{CH}}_3-\mathrm{CH}={\mathrm{CH}}_2$

Which hybrid orbitals are used by carbon atoms in the following molecule? 

${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{OH}$

Which hybrid orbitals are used by carbon atoms in the following molecule?

${\mathrm{CH}}_3-\mathrm{CHO}$

Which hybrid orbitals are used by carbon atoms in the following molecule? 

${\mathrm{CH}}_3\mathrm{COOH}$