Question

A chemist performs a series of reactions that produce binary lithium compounds. The elements include sulfur, chlorine, nitrogen, fluorine, selenium, oxygen, and iodine. The models below represent the ionic radii of compounds formed by reacting lithium with three of the elements.
a. Identify the three compounds that the models represent. Explain your answer. (2 points)

b. Write a hypothesis that the chemist might use when investigating another periodic trend of various elements. (2 points)

Here is the link to the model:
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Answer 1

did u get the answer

Answer 2

Li gives 1 electron. The 3 halogens in the question (F, Cl, and I) all take 1 electron so those are most likely the 3 compounds. Then, ionic radius increases down a group, so the largest is I, which would be compound A. The smallest would be F, which is compound B. The middle is Cl, which is compound C