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Modern Physics

Blazing goIITian

Joined:	6 Nov 2007
Post:	512

3 Mar 2008 15:14:12 IST

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444

atoms and nuclei:::::

None

A helium atom consists of two electrons orbiting round a nucleus of charge Z=2.But the electrons do not see the full charge Z=2 of the nucleus.Each electron sees the nucleus slightly screened by the other electrons so that the effective charge Z_effseen by each electron is less than 2.The ionisation potential for a He atom in its ground state is measured experimentally to be 24.46eV.Estimate the effective charge of the nucleus as seen by each electron in the helium ground state.

plz xplain it clearly.

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|~|aRs|~|

Blazing goIITian

Joined: 6 Nov 2007

Posts: 512

5 Mar 2008 00:13:32 IST

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Kya hua yaar?

kya aap log sirf kehene ke expert hai kya?Plz solve it yaar.its boards.

Bhupesh Mohanty

Moderator

Joined: 29 Dec 2006

Posts: 1037

25 Mar 2008 10:38:44 IST

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Dear

What ever you would have applied to find the charge of the elcetron in the given context is still true only thing taken in to consideration is a factor ( less than one ) to be multiplied to all your expression .

Try this and let me know if found any problem . The physics in the question is that less than one factor. Rest is mathematics Please try to understand the physics and let me know

dont u know me

Blazing goIITian

Joined: 5 Dec 2007

Posts: 704

3 Apr 2008 00:15:34 IST

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canu tell me d answer plzzzzzzzzzzzzzzzz! !!!!!!!!!!!!!!!

dont u know me

Blazing goIITian

Joined: 5 Dec 2007

Posts: 704

3 Apr 2008 00:17:36 IST

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its coming out to b 2.4 x 10^-19

swati purnima

Scorching goIITian

Joined: 3 Dec 2007

Posts: 260

3 Apr 2008 11:11:04 IST

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jaldi batao yaar ok me ayshwarya ki bahen hun koi batayega ki kya mera ans karet hai ya nahin

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