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a13 - common Elements in groups IA IIA and IIIA do not...

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Remember: Exceptions to the Octet Rule It is very important that you understand the basics of what we have just covered before worrying about exceptions. In almost all cases, the elements in the first and second periods are used for electron-dot formulas. There are important exceptions but these are not as
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Unformatted text preview: common. Elements in groups IA, IIA and IIIA do not follow the " octet rule " that we used for the above problems. When we write the electron-dot formula for BF 3 , the boron will not have eight electrons and that is just fine. ..it helps us understand its chemical character....
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