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Any Chem AS question to be posted here :):)

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Haaks18:
all the questions right here will be mainly about Chem AS.. Here u can discuss and the questions u r confused about and OFCOURSE nothing is possible in SF ;)

Haaks18:
What does Shielding in the Atomic Structure chapter means??
And in Atomic Structure do we have to knw about Nuclear fission and fusion?!
Thanks aloot :)

Amelia:

--- Quote from: Haaks18 on November 27, 2010, 12:15:17 am ---all the questions right here will be mainly about Chem AS.. Here u can discuss and the questions u r confused about and OFCOURSE nothing is possible in SF ;)

--- End quote ---

You mean impossible, buddy.  ;)

Sheilding Effect of Electrons in an atom.
All electrons are negetively charged and repel each other. Electrons in filled inner shells repel electrons in the outer shells and reduce the effect of positive nuclear charge. This is called Shielding effect. The greater the shielding effect upon an electron, the lower is the Ionization energy.

(These come under the heading of Nuclear Chemistry)
Nuclear Fission is when a nucleus splits into half and produces a great amount of energy. The energy generated by splitting the atom was called atomic energy.

Nuclear Fusion is when  two small nuclei such as those in Hydrogen combine to form a large nucleus. The energy is released in tremendous amount.

Amelia:
You can post your doubts, here

https://studentforums.biz/sciences-149/chemistry-doubts-10366/
or here
https://studentforums.biz/sciences-149/edexcel-chemistry-doubts
(depending on what you take)

P.S - Good luck!

AS-Girl:
hey again
i have a question that came to my mind yesterday..
we did solubiltiy product for compounds which have the same mole ratio like   AgCl---->Ag +   and Cl-

but what if the compound has a different miole ration like Mg(OH)2-------->Mg2+ and 2OH-

how can we get the solubility of both ions??

i know we get Ksp= [Mg2+] [Oh-]2

then what??

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