Question

in this performance task, you will answer 4 questions. the united nations declared the year 2019 as the year of the periodic table. the year 2019 marks 150 years since the discovery of the periodic system of the arrangement of elements which led to the periodic table, mostly credited to dmitri mendeleev. since 1869, scientists have discovered or synthesized a number of new elements which exhibit properties in keeping with the logic of the arrangement of elements in the periodic table. like mendeleev, scientists have been able to predict the atomic number, placement in the periodic table, and properties of elements that had not yet been discovered or synthesized. in 2016, the international union of pure and applied chemistry (iupac) announced the discovery of four new elements with atomic number, name, and symbol as follows: • 113, nihonium, nh • 115, moscovium, mc • 117, tennessine, ts • 118, oganesson, og these new elements all occupy period 7 of the table, with oganesson (og) being a noble gas. which of the four elements is most likely to form cations in its reactions? o og o ts o nh o mc

Explanation:

Cations are positively - charged ions formed by the loss of electrons. Metals tend to form cations. Among the given elements, Nihonium (Nh) is a metal. Oganesson (Og) is a noble gas and is very stable and unlikely to form ions. Tennessine (Ts) is a halogen - like element and is more likely to gain electrons to form anions. Moscovium (Mc) is also less metallic than Nh. So, Nh is most likely to form cations.

Answer:

Nh