Predict some of the properties of element 117 (the symbol is Uus, following conventions proposed by the International Union of Pure and Applied Chemistry, or IUPAC). a. What will be its electron configuration? b. What element will it most resemble chemically? c. What will be the formula of the neutral binary compounds it forms with sodium, magnesium, carbon, and oxygen? d. What oxyanions would you expect Uus to form?

Element 117 (Uus) has 117 electrons. Its electron configuration can be determined by following the order of filling orbitals in the periodic table. We'll note the abbreviated electron configuration (using noble gas notation) for Uus: \[ [Rn] 5f^{14} 6d^{10} 7s^2 7p^5 \] This indicates that Uus is in Group 17, which contains the halogens.

Since Uus is in Group 17, it will share similar chemical properties with other halogens such as fluorine, chlorine, bromine, and iodine. One of the key aspects is that halogens are highly reactive non-metals. However, as atomic number increases within this group, reactivity usually decreases. Based on this information, Uus will most closely resemble astatine (At), which is directly above it in the periodic table.

Uus, being a halogen, will likely have a -1 oxidation state when forming neutral binary compounds. Thus, the compounds formed by Uus with each of the elements mentioned will have the following formulas: 1. Sodium (Na): Sodium usually has an oxidation state of +1. Since Uus has an oxidation state of -1, the formula for the resultant compound will be NaUus. 2. Magnesium (Mg): Magnesium usually has an oxidation state of +2. To balance the charges, the formula for the compound will be Mg(Uus)\(_2\). 3. Carbon (C): Carbon can have multiple oxidation states. When forming a carbide, it often has an oxidation state of -4. To balance the charges, the compound formula would be Uus\(_4\)C. 4. Oxygen (O): Oxygen usually has an oxidation state of -2. Since Uus has an oxidation state of -1, the compound would have the formula O(Uus)\(_2\).

Oxyanions are formed when a non-metal combines with oxygen and gains a charge. Halogens commonly form oxyanions with varying numbers of oxygen atoms. Taking inspiration from chlorine's oxyanions, which range from ClO to ClO\(_4$$^-\), and iodine's oxyanion from IO\(_3$$^-\) to IO\(_4$$^-\), it can be expected that Uus would form similar oxyanions. Some possible oxyanions of Uus could be UusO, UusO\(_2$$^-\), UusO\(_3$$^-\), and UusO\(_4$$^-\), though this is not an exhaustive list, and the stability of these oxyanions is not guaranteed.