Which of these molecule(s) do not obey octet rule? BCl3 IF7 KrF2 All of these
Question
Which of these molecule(s) do not obey octet rule? BCl3 IF7 KrF2 All of these
Solution
All of these molecules do not obey the octet rule.
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BCl3 (Boron Trichloride): Boron has only six electrons in its valence shell, not eight.
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IF7 (Iodine Heptafluoride): Iodine has more than eight electrons in its valence shell. It has 12 electrons in its valence shell.
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KrF2 (Krypton Difluoride): Krypton also has more than eight electrons in its valence shell. It has 10 electrons in its valence shell.
The octet rule states that atoms tend to combine in such a way that they each have eight electrons in their valence shells, giving them the same electronic configuration as a noble gas. The molecules listed above do not follow this rule.
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