element 118 was reportedly synthesized in 1999, but the claim was later retracted. as a consequence of that experiment, element 116 was discovered. to what period and group would each of these two elements belong, and what known elements should each resemble?
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Element 118, initially reported to be synthesized in 1999 but later retracted, would belong to the period 7 and group 18 in the periodic table. Group 18 is known as the noble gases or Group 0. These elements are inert and have a full valence electron shell, making them stable and unreactive. Therefore, if element 118 were to exist, it would resemble other noble gases like helium, neon, argon, krypton, xenon, and radon.
On the other hand, element 116 was discovered as a consequence of the experiment that led to the retraction of element 118's claim. Element 116 would belong to the same period, i.e., period 7, but it would belong to group 16. Group 16 elements are commonly known as the chalcogens. They include elements like oxygen, sulfur, selenium, and tellurium. These elements usually have six valence electrons and exhibit a range of chemical properties related to oxygen and sulfur. If element 116 were to exist, it would likely resemble these chalcogens.
To determine the period and group of elements 118 and 116, as well as their resemblances to known elements, we can consult the periodic table and the theoretical predictions based on their respective atomic numbers.
Element 118, also known as ununoctium (Uuo), was initially reported to have been synthesized in 1999. However, this claim was later retracted due to errors in the research. According to its atomic number, we can infer that element 118 would belong to the 7th period of the periodic table. Since it is in Group 18, also known as the noble gases, it would be expected to share some similarities with other noble gases like helium (He), neon (Ne), and argon (Ar). Noble gases are generally chemically inert and have a full complement of electrons, making them stable.
On the other hand, the discovery of element 116 resulted from the same experiment that led to the retraction of element 118. Element 116 is known as livermorium (Lv) and was officially synthesized in 2000 by a different research team. Based on its atomic number, we can deduce that element 116 would be located in the 7th period of the periodic table as well. It belongs to Group 16, also known as the chalcogens. Chalcogens include oxygen (O), sulfur (S), selenium (Se), and tellurium (Te). These elements are generally reactive and tend to form compounds with other elements.
However, it is important to note that due to the unstable and highly radioactive nature of these superheavy elements, their chemical properties may be difficult to determine definitively. Experimental data is limited, and much of the information about their properties is based on theoretical predictions.
In summary, element 118 (ununoctium) would be in the 7th period, Group 18 (noble gases) and would resemble other noble gases like helium, neon, and argon. Element 116 (livermorium) would also be in the 7th period but in Group 16 (chalcogens) and would share characteristics with elements like oxygen, sulfur, selenium, and tellurium.