Question

can someone tell me what is the effective screening effect (Z.eff) of Al ?

Answer 1

I found this link: http://books.google.com/books?id=5Hf-uK58OZIC&pg=SA2-PA5&lpg=SA2-PA5&dq=screening+effect+Zeff+Al&source=bl&ots=kJjx7T21jD&sig=Fk1Zz-tDqBz4h5rk4ihMNgIO6AY&hl=en&ei=d9zYToQ76eGIAr_j2Z8K&sa=X&oi=book_result&ct=result&resnum=4&ved=0CDEQ6AEwAw#v=onepage&q=screening%20effect%20Zeff%20Al&f=false
I kind of like it.
Usually there is no number for Zeff, but you will be asked to order a set of elements. So you have to be able to decide which has a bigger screening effect than which one.

Answer 2

oh..ok.. nd thx fr the link..it helped :)