🤓 Based on our data, we think this question is relevant for Professor Buckley's class at WSU.
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?
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.