Describe the covalent bond as attraction between a shared electron pair and the nuclei, and draw Lewis formulas for molecules and ions with up to four electron pairs per atom, including species with incomplete octets such as BF3.
At room temperature hydrogen cyanide is a liquid that evaporates readily, whereas ethyne, , which has almost the same molar mass, is a gas that boils at −84 °C. (i) Draw the Lewis formula of the hydrogen cyanide molecule, showing all valence…
(i) Draw the Lewis formula of buta-1,3-diene. (ii) State the hybridization of the carbon atoms in buta-1,3-diene.
Both ionic and covalent bonding are present in sodium ethanedioate, . (i) Describe both types of chemical bonding present in this compound. Ionic bonding: Covalent bonding: (ii) Deduce a Lewis formula of the ethanedioate ion, .…
For which of these molecules is the octet rule satisfied by every atom? I. II. III. A. I and II only B. I and III only C. II and III only D. I, II and III
(i) State the electron configuration of a nitrogen atom. (ii) Draw the Lewis formula of ammonia. (iii) Deduce the electron domain geometry and the molecular geometry of the ammonia molecule. (iv) Explain why the ammonia molecule is polar.
Sulfur forms a dichloride, , and a hexafluoride, . (i) Deduce the Lewis formula of . (ii) Deduce the molecular geometry of and of . (iii) Suggest a value for the bond angle in .
A computer simulation models what happens when small pieces of lithium and of sodium are dropped into water. For each metal five pieces of increasing mass are used, the same set of masses for both metals, and the simulation records how long each piece takes to…