In this problem, we are asked to prove why I3- would exist, and F3- would not.
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 I3-, and F3-.
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.
Although I3- is known, F3- is not.
One of your classmates says F3- does not exist because it would violate the octet rule. Is this classmate possibly correct?
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Lewis Dot Structures: Exceptions concept. You can view video lessons to learn Lewis Dot Structures: Exceptions. Or if you need more Lewis Dot Structures: Exceptions practice, you can also practice Lewis Dot Structures: Exceptions practice problems.
What professor is this problem relevant for?
Based on our data, we think this problem is relevant for Professor Dixon's class at UCF.