Octet Rule and Exceptions
Chemistry ⇒ Chemical Bonding and Structure
Octet Rule and Exceptions starts at 9 and continues till grade 12.
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Describe the difference between an incomplete octet and an expanded octet.
Describe what is meant by an 'expanded octet'.
Describe why beryllium chloride (BeCl₂) is considered an exception to the octet rule.
Describe why some molecules have an odd number of electrons and cannot satisfy the octet rule.
Explain why hydrogen does not follow the octet rule.
Explain why NO₂ is an exception to the octet rule.
Explain why phosphorus pentachloride (PCl₅) is an exception to the octet rule.
Explain why some elements can have more than eight electrons in their valence shell.
What is the octet rule in chemistry?
Which period in the periodic table do elements first become able to have expanded octets?
Consider the molecule ClO2. Explain why this molecule is considered an exception to the octet rule and describe the type of exception it represents.
Describe how the octet rule helps predict the number of bonds an atom will form, and give an example of an exception to this prediction.
State one reason why elements in the third period and beyond can form compounds with expanded octets, but elements in the second period cannot.
