Problem: Which of the following contains an atom that does not obey the octet rule?a. KBrb. CO2c. ClF3d. ICl

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FREE Expert Solution

We’re being asked to determine which molecule contains an atom that does not follow the octet rule


Recall that the octet rule states that an element is surrounded by eight electrons in the Lewis structure. 


Exceptions to this rule occur when:

• there is an odd number of electrons, like in radicals

• there are less than 8 electrons or incomplete octet

• there are more than 8 electrons or expanded octet. This occurs to nonmetals from Period 3 to 7.


For this problem, we need to draw the Lewis structure for each compound. 


To do so, we need the following steps:

Step 1: Determine the central atom in this molecule.

Step 2: Calculate the total number of valence electrons present.

Step 3: Draw the Lewis structure for the molecule.


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Problem Details

Which of the following contains an atom that does not obey the octet rule?

a. KBr

b. CO2

c. ClF3

d. ICl

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