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All about ions


aommaster

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aommaster said in post #2 :

How come iron and copper each form two different ions?

 

I think iron forms 2+ and3+ while copper forms 1+ and 2+

 

How is this possible? I thought elements form their own ion!!!

 

 

 

it depends what they bond to, think Cation structure and what it would take to make a stable compound :)

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  • 2 weeks later...
aommaster said in post #2 :

How come iron and copper each form two different ions?

 

I think iron forms 2+ and3+ while copper forms 1+ and 2+

 

How is this possible? I thought elements form their own ion!!!

 

 

 

They're transition metals.. thats what they do. Not just iron and copper: all elements in that middle portion of the periodic table have multiple charges. It depends on what they bond to.

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All you ever want to do is create full outer "shells" i.e. look at Na it wants to loose a electron to create a full 1st shell (1st shells are happy (stable) when they have 2 electrons), so the best way would be to create a NaF compounds, as F wants to gain one electron, Al wants to loose 3 electrons so you would bond it to a elemt(s) that wants to gain 3 i.e. N.

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yeah, trasition metals are kinda hard to predict -- your teacher is somewhat correct. In order to even start to accurately predict what ions trasition metals form, you need to lean a bit of what is called "group theory."

 

However, there are some simple predictions that can be made for a very few of the trasition metals. But over all, in order to predict charge on a metal, you need to know coordination number, coordination environment, feild splitting of the orbitals, ect. It is quite a mess :P

 

But it is very cool.

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in Wolfsons reply #20, he mentions 2p6, well 2p6 is known as Neon or Ne.

that may help understanding his post #17.

[Ne].3s2.3p1 is must faster and just as understandable as,

 

1s2, 2s2,2p1,2p2,2p3,2p4,2p5,2p6,3s1,3s2,3p1 (quite a mouthfull eh!)

 

so instead of doing every single period, we just look down the last group Ne, Ar, Kr, Xe, Rn (we don`t really use He as that`s the 1`st to appear anyway) and start from there, because we don`t need to know ALL the stuff that came before it :)

it may help you to get a spare periodic table and write the Blocks and Shells down etc,,,

 

btw, there has been a new element discovered! called BOo, they`re thinking of naming it the Element of Surprise :)

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