I am confused about this problem. Any help is appreciated.
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 models:
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Make sure do delete the space between h and t when copying it and pasting it into the search. I did that because jiskha doesn't allow URLs.
I apologize, but as an AI text-based bot, I cannot directly access external links or view images. However, I can still try to help you with the problem based on the information you provided.
a. To identify the compounds that the models represent, you will need to consider the elements involved and their ionic radii. Given that the elements mentioned are sulfur, chlorine, nitrogen, fluorine, selenium, oxygen, and iodine, let's analyze the possibilities.
Lithium can form compounds with these elements by either gaining or losing electrons. To determine which compounds are represented in the models, we can consider the relative sizes of the ions formed.
For example, if the lithium ion is smaller than the other ion in the compound, lithium has likely lost an electron and formed a positive ion. If the lithium ion is larger than the other ion, lithium has likely gained an electron and formed a negative ion.
Unfortunately, since I cannot view the models, I cannot provide a specific answer based on the given link. However, you can visually compare the sizes of the ions represented in the models and match them with the given elements to identify the compounds.
b. To write a hypothesis for investigating another periodic trend, you can consider different trends such as atomic radius, ionization energy, electronegativity, or other properties based on the periodic table.
Here is an example hypothesis:
"Hypothesis: The ionization energy increases as we move across a period in the periodic table. This means that elements on the right side of the periodic table will require more energy to remove an electron compared to elements on the left side."
Remember that the hypothesis should be testable and based on previous knowledge or observations. You can modify or choose a different periodic trend to investigate based on your interests.
Unfortunately, as an AI bot, I don't have access to the internet or the ability to click on links. However, I can still provide you with some guidance on how to solve the problem.
To identify the three compounds represented by the models, you need to know the ionic radii of lithium compounds formed with the given elements. Ionic radii represent the size of ions.
Here's how you can approach this problem:
1. Look up the ionic radii of the given elements (sulfur, chlorine, nitrogen, fluorine, selenium, oxygen, and iodine). You can find this information in a chemistry reference book or by doing an internet search.
2. Compare the ionic radii of lithium with the ionic radii of the given elements. Remember that when lithium reacts with another element to form a compound, it will either gain or lose electrons to achieve a stable electron configuration.
3. The compound formed will depend on the size of the ions involved. If the ionic radii of lithium and the other element are similar, they are more likely to form a compound.
4. Analyze the models provided by comparing the sizes of the spheres. Identify the compounds that exhibit similar ionic radii for lithium and the other elements represented in the models.
For part b, you need to write a hypothesis that the chemist might use when investigating another periodic trend of various elements. A hypothesis is a proposed explanation or prediction for a phenomenon that can be tested. It should be specific and testable.
A possible hypothesis for investigating another periodic trend could be:
"Hypothesis: As the atomic number of elements increases within the same group of the periodic table, the ionization energy decreases."
You can modify this hypothesis based on the specific periodic trend you are interested in studying, such as electronegativity, atomic radius, or some other property.
I hope this guidance helps you understand how to approach and solve the problem. If you have any further questions, feel free to ask!