Chemical Forums

Chemistry Forums for Students => High School Chemistry Forum => Topic started by: 시1발버러지새끼들아 on August 05, 2013, 06:43:55 AM

Title: what the... Effective nuclear charge???
Post by: 시1발버러지새끼들아 on August 05, 2013, 06:43:55 AM

Hi, I was wondering the effective nuclear charge.

In the periodic table, the effective nuclear charge increases in the same family.

but my book said that it decreases because atom radius increases so that it means decreasing of effective nuclear charge.

I think the book is wrong...

Do u think so???

*MOD Edit* -- Extra text removed

Title: Re: what the... Effective nuclear charge???
Post by: Hunter2 on August 05, 2013, 08:05:46 AM

Something to read:

https://en.wikipedia.org/wiki/Effective_nuclear_charge

Title: Re: what the... Effective nuclear charge???
Post by: Sylvia Goade on August 09, 2013, 09:23:22 PM

Quote from: Hunter2 on August 05, 2013, 08:05:46 AM

Something to read:

https://en.wikipedia.org/wiki/Effective_nuclear_charge

still hard to understand.  :'(

Title: Re: what the... Effective nuclear charge???
Post by: Wystale on August 12, 2013, 11:53:38 AM

Hi,
The effective nuclear charge decreases in the same family. When you go down, there is more core electrons (the number of valence electrons stay the same), so if we consider one valence electron, the charge he perceives will be more attenuate.

Title: Re: what the... Effective nuclear charge???
Post by: kelnet100 on August 13, 2013, 12:33:36 PM

A note about the relationship between atomic radius and effective nuclear charge... across a period the atomic radius decreases because there are more protons in the nucleus, which allows them to pull the electrons in more closely.  :)