Hi all, just started chem11 today...so so difficult! Please, i've been working on this for hours now, please help...i need to draw the lewis structure for
a.) Aluminium Oxide
and b.) Sodium oxide - i think this one goes like this: 2Na+ (:O:)- with 2 dots above and under O...
pls pls help! thanks a bunch
2007-01-15 04:42:22 · 3 answers · asked by Vote4Pedro 2 in Science & Mathematics ➔ Chemistry
the biggest thing about lewis dot structure is finding out how many electrons are in each elements outer shell. Aluminum has 3, Oxygen has 6. Keeping in mind that all elements want to have 8 electrons in their outer shells, that will help you to understand how many Oxygens will attach to each Aluminum. Aluminum Oxide is Al2O3, and is a 5 membered ring, with an Ox between the two Al. I believe the two Oxygen have a double bond between them.
Sodium Oxide is Na : O :Na, the oxygen has two lone pairs attached as well, there are no formal charges.
2007-01-15 05:12:29 · answer #1 · answered by raegurl99 2 · 0⤊ 0⤋
Well, I'm going to assume you know what a lewis structure is, or else you wouldn't be in chem II. First, figure out how aluminum and oxygen and sodium and oxygen bond. you can do this easily by taking their oxidation numbers and flipping them to make the subscripts. Ignore any negatives in the oxidation number for this. From here it should be easy to find the valence electrons. From there, you just draw your diagram. Hope this helps!
2007-01-15 12:56:19 · answer #2 · answered by Ian 3 · 0⤊ 0⤋
a) Write down Al and Al with nothing around them. They lost their three valence electrons. Write three O's each with six dots and two x's. They had six valence electrons, the dots, and they got two more each from the Al's, the x's. You should probably put 3+ by each Al and 2- by each O, so the teacher knows you know what goes on.
b.) The same, with two Na's. The one O has six dots and two x's, one x from each Na. Also, + by Na and = by O.
2007-01-15 13:00:41 · answer #3 · answered by steve_geo1 7 · 0⤊ 0⤋