91Ó°ÊÓ

Give the ground-state electron configuration for each of the following elements: (a) Oxygen (b) Phosphorus (c) Sulfur

How many electrons does each of the following biological trace elements have in its outermost electron shell? (a) Magnesium (b) Cobalt (c) Selenium

Draw a molecule of chloroform, \(\mathrm{CHCl}_{3}\), using solid, wedged, and dashed lines to show its tetrahedral geometry.

Convert the following representation of ethane, \(\mathrm{C}_{2} \mathrm{H}_{6}\), into a conventional drawing that uses solid, wedged, and dashed lines to indicate tetrahedral geometry around each carbon (gray \(=\mathrm{C}\), ivory \(=\mathrm{H}\) ).

Draw line-bond structures for the following substances, showing all nonbonding electrons: (a) \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}\), ethanol (b) \(\mathrm{H}_{2} \mathrm{~S}\), hydrogen sulfide (c) \(\mathrm{CH}_{3} \mathrm{NH}_{2}\), methylamine (d) \(\mathrm{N}\left(\mathrm{CH}_{3}\right)_{3}\), trimethylamine

Why can't an organic molecule have the formula \(\mathrm{C}_{2} \mathrm{H}_{7} ?\)

Draw a line-bond structure for propane, \(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{3} .\) Predict the value of each bond angle, and indicate the overall shape of the molecule.

Draw a line-bond structure for propene, \(\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CH}_{2} ;\) indicate the hybridization of each carbon; and predict the value of each bond angle.

Draw a line-bond structure for buta- 1,3 -diene, \(\mathrm{H}_{2} \mathrm{C}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}_{2} ;\) indicate the hybridization of each carbon; and predict the value of each bond angle.

Draw a line-bond structure for propyne, \(\mathrm{CH}_{3} \mathrm{C}=\mathrm{CH} ;\) indicate the hybridization of each carbon; and predict a value for each bond angle.