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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: Victorian91 on February 15, 2009, 11:24:05 AM

Title: Ionisation Energy of Lithium and Boron..
Post by: Victorian91 on February 15, 2009, 11:24:05 AM

I dont really understand why ionisation energy of boron is higher than lithium...
I know because the atomic radius of boron is smaller than lithium..
That's why the effective nuclear charge of boron is higher, causing the electrons to be pulled closer to the nucleus..

But if using Slater's rules..

The effective nuclear energy of boron is higher than lithium ..
Then why the ionisation energy of boron is higher than lithium..
Can someone pls help me..
Thanks

Title: Re: Ionisation Energy of Lithium and Boron..
Post by: Astrokel on February 15, 2009, 12:25:27 PM

Quote

The effective nuclear energy of boron is higher than lithium ..
Then why the ionisation energy of boron is higher than lithium..

Huh, these two statements seem complement than contradict.