Chemical Forums
Chemistry Forums for Students => High School Chemistry Forum => Topic started by: Stephen on August 17, 2009, 10:52:29 AM
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Some four-atom particle is very widespreaded in nature, and is made by two type of atoms!It has 30p+, 30no 32e-(from who, 24 are valence electrons!). Write structural formula of this particle!
I have problem with doing this, and only thing I can see is this particle is ion 2-!
How to think in this kind of exercises! ???
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I have problem with doing this, and only thing I can see is this particle is ion 2-!
How to think in this kind of exercises! ???
OK, you are correct - this is an ion with a charge of 2-
Now, out of 32 electrons, 24 are valence electrons (outer shell) - so where are the other 8? They must be in the inner shells...
If we have an ion that has 8 inner shell electrons in total, made up of four atoms, what might that tell you about which period these atoms must come from?
Hint: Think about how many inner shell (non-valence) electrons do the atoms from each period have, and remember there are four atoms in the unknown ion...
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What is molar mass of the ion?
What -2 charged ions do you know?
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Hey, one question here...
1st shell = 2 e
2nd shell = 8e
3rd shell = 18e
4rd shell = 32e
5th shell = is it 50? since the equation is (2n^2)
6th shell = ...
7th shell = ...
hurm... I wonder if the valence electron is too large, hot to form ion, there are no charge more than 3 right?
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there are no charge more than 3 right?
There is. Ti4+ for example