Although I₃^- is a known ion, F₃^- is not. 

(a) Draw the Lewis structure for I₃^- (it is linear, not a triangle). 

(b) One of your classmates says that F₃^- does not exist because F is too electronegative to make bonds with another atom. Give an example that proves your classmate is wrong. 

(c) Another classmate says F₃^- does not exist because it would violate the octet rule. Is this classmate possibly correct? 

(d) Yet another classmate says F₃^- does not exist because F is too small to make bonds to more than one atom. Is this classmate possibly correct?