There is absolutely NO way to have all the electrons pair up and one of the atoms must have an odd total electron count as well. The best Lewis structure maximizes the number of bonds but does not violate the true octet rule: neither 2nd period atom exceeds an octet!
www.research.umbc.edu/~budzicho/Chp11note2.html
Hydrogen which is stable with 2 valence electrons. Lithium is also stable with 2 after is loses one but only in certain situations. Beryllium which is stable with 4 valence electrons. Boron which is stable with 6 valence electrons.
http://wiki.answers.com/Q/Which_two_atoms_are_exception...
Having too few valence electrons to ever obtain an octet. ... Boron will have 6 valence electrons after it shares its valence electrons with other atoms. ... There are two ways that atoms will not be able to obey the octet rule. These are:
www.saskschools.ca/curr_content/chem20/covmolec/exceptn... www.saskschools.ca/curr_content/chem20/covmolec/exceptns.html
The octet rule for drawing Lewis structures states that all atoms must be surrounded by eight electrons. However, boron and beryllium are sometimes stable in compounds with less than an octet. In compounds, Be is generally satisfied with 4 valence electrons and B is generally satisfied with 6...
www.mhhe.com/physsci/chemistry/chang7/esp/folder_struct... www.mhhe.com/physsci/chemistry/chang7/esp/folder_structure/bo/m2/s2/index.htm
The octet rule says that atoms tend to gain, lose or share electrons so as to have eight electrons in their outer electron shell. It is a very useful rule but you should also know that there are many bonding situations where it does not apply.
dl.clackamas.cc.or.us/ch104-08/octet.htm dl.clackamas.cc.or.us/ch104-08/octet.htm
3. PLACE A PAIR OF ELECTRONS BETWEEN EACH PAIR OF ATOMS WHICH ARE BONDED TO EACH OTHER PLACE THE REMAINING ELECTRON PAIRS AROUND EACH ATOM TRYING TO SATISFY THE OCTET RULE IF NOT ENOUGH ELECTRONS, ... EXCEPTIONS TO THE OCTET RULE 1. NOT ENOUGH ELECTRONS: BeH2 2. ODD NUMBER OF ELECTRONS: NO 3. THIRD, ETC. PERIOD ELEMENTS:
www.uwplatt.edu/~sundin/114/l114-29.htm
IF NOT ENOUGH ELECTRONS TO SATISFY OCTET RULE, MAKE DOUBLE OR TRIPLE BONDS IF ALL ATOMS HAVE OCTETS, AND HAVE ELECTRONS LEFT OVER, PUT EXTRA ELECTRONS ON ELEMENTS WITH "d" ORBITALS ... EXCEPTIONS TO THE OCTET RULE 1. NOT ENOUGH ELECTRONS: BeH2 2. ODD NUMBER OF ELECTRONS: NO 3. THIRD, ETC. PERIOD ELEMENTS: PCl5; SF6...
www.uwplatt.edu/~sundin/114/l114_28.htm
There are three general ways in which the octet rule breaks down: ... More than an octet (most common example of exceptions to the octet rule) ... 3. Add octet of electrons to outer atoms:
www.mikeblaber.org/oldwine/chm1045/notes/Bonding/Except... www.mikeblaber.org/oldwine/chm1045/notes/Bonding/Except/Bond08.htm
The Cl and F atoms have 7 electrons in their valence shells. Therefore, they need one more electron each to attain noble gas configuration.In doing so,Phosphorous has 10 electrons,Iodine has 14 electrons and Sulphur has ... Subject > Chemistry > Chemistry III > Chemical Bonding > Exceptions to the Octet Rule...
www.tutorvista.com/content/chemistry/chemistry-iii/chem... www.tutorvista.com/content/chemistry/chemistry-iii/chemical-bonding/octet-rule.php
The octet rule provides a way to predict what kind of ion an atom will form. The rule usually applies to the representative elements. The rule has many exceptions, but is still very useful. The breaks down for elements in periods 3 through 7.
www.800mainstreet.com/4/0004-005-ion-octet.html www.800mainstreet.com/4/0004-005-ion-octet.html