why is boron an exception to the octet rule?

Subject: why is boron an exception to the octet rule?

Date: Fri Jun 6 23:05:59 2003
Posted by Ahmed
Grade level: teacher/prof School: Kaplan educational center
City: kansas city State/Province: mo Country: usa
Area of science: Chemistry
ID: 1054958759.Ch

Message:


I realize that elements in the 3rd period and above have the unfilled d 
orbitals to expand their octet, but in the case of boron for example, they say 
boron can only have 6 valence electrons. doesnt the 2s2 orbital along with the 
p orbitals classify boron as an 8 valence electron atom as opposed to a 6.

Re: why is boron an exception to the octet rule?

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