Chemistry – Chemical Bonding (18 of 35) Lewis Structures for Ionic Comp – Aluminum Oxide – Al2O3.Click to see full answer. Besides, what is the Lewis dot structure for aluminum?Answer: Aluminum is in group IIIA of the periodic table therefore it has three valence electrons. The symbol for aluminum is Al which will be surrounded by three dots. 2.Likewise, how many valence electrons does aluminum oxide have? 3 valence electrons Also question is, what is the formula unit for aluminum oxide? The formula unit for aluminum oxide is Al2 O3.How many lone pairs are in aluminum?An ideal triple bond between two identical atoms, Boldyrev says, involves 10 electrons: six of them in π and σ bonds between the atoms and four in lone pairs. Elements like nitrogen, with five valence electrons, are well suited to the task, but aluminum falls two electrons short.