Can someone help me with Ionic bonding?

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Can someone help me understand the process of ionic bonding please? :)

Posted Mon 18th June, 2012 @ 09:53 by Izzy Swain

4 Answers

  • 2 votes

Hi :) yeah I could give it a shot. Ionic bonding basically means the 'donation' of electrons to complete the outer shell of electrons. As an atom without a full outer shell of electrons is very reactive as it is unstable, that atom may try and gain or lose electrons to have a full outer shell. For example, Magnesium Oxide.

Magnesium is in group 2. therefore it needs to LOSE two electrons. On the other hand, oxygen is in group 6 and needs to GAIN two electrons. Therefore Magnesium 'lends' two electrons to oxygen to give them full outer shells. These give two ions - magnesium ion ( Mg 2+ which is a positive ion or a cation) and oxygen ion (O 2- which is a negative ion or anion). However, these bind together as they are attracted to each other as they are now ions and thus have a charge. Therefore the two ions are IONICALLY BONDED

 hope this helps :) 

Answered Mon 18th June, 2012 @ 12:51 by Olivia Crawley
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Yeah thanks it does help :)

Answered Mon 18th June, 2012 @ 16:04 by Izzy Swain
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Yeah izzy try this , i posted something very similar n i think it will help u as well !!:

one way to remember this is the groups on the top tell u how many outer electrons there are, so group 1 metals are the most reactive because they want to become stable and to do that they need to have a full outer shell.

now if we take sodium which is in group 1 u know that it has 1 outer electron. U also know that the elements in the periodic table are neutral. This means that they must have equal number of protons and electrons

What does this mean????

Well if sodium is losing 1 electron then it measn that there is more protons than electrons because 1 electron left. Therefore it has 1+ charge! 

This is just the breakdown of why they have such a charge, but all u have to do is look at the group of the element and that group number will tell u that it is a positive charge n the number will tell u how many electrons left e.g if 1 electron leaves then you get 1+ , if 2 electrons leave then it will have a charge of 2+ .

Now does that mean chlorine which is in group 7 has a charge of 7+ ????????????

No! If u read before i said that elements want to gets a full outer shell. Now if chlorine has 7 outer electrons then u ask urself this question, is it easier to lose 7 electrons or GAIN 1 ELECTRON!!!! 

Obviously it is easier to get 1 electron!!!!!! AAAAHHH! this means that there are more electrons then protons therefore if we say chlorine gains 1 electron, it means it has a charge of -1!!!

Another example is oxygen which is in group 6. u ask urself again whether it is easier to lose 6 electrons or gain two electron etc... then u know it has a -2 charge!!!!

What about sulphur which is in group 4?????

That is a good question because it could either lose of gain 4 electrons. The answer to this is the following. (P.S im not sure if u need to know this but ill tell u anyway as it is good info for further chemistry if u take it =D)

Group 4 elements dont from ions! What i mean to say is under natural conditions they will not form a ionic compound (ionic compound: is when two opposite charged ions bond together), instead they bond covalently which is that they dont have a charge but instead they share their electrons with the other element or atom!!!!

Summary

Groups: tell u how many electrons are in the outer shell

Periods: I didnt mention it but it means how many electron shells a element has (how many rings it has e.g. if u look at this link, and u count how many rings it has ===> there are 2!:

http://nn.wikipedia.org/wiki/Fil:Electron_shell_008_oxygen.png)

Non-metals (Groups 5,6,7) form negative ions!!!!!!!!!!!

Metals (Groups 1,2,3) form positive ions !!!!!!!!!

Anyway hope i helped =D **

hope it helped

Answered Wed 27th June, 2012 @ 20:58 by Braniac
Edited by Braniac on Fri 29th June, 2012 @ 07:48
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Thanks :) x

Answered Thu 28th June, 2012 @ 15:40 by Izzy Swain