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. the search is now on for element with atomic number 119. based on periodic trends, which of the following would most likely be true of this element? it would be a nonmetal. it would be placed in period 7. it would have a full valence shell of electrons. it would most likely form cations when it reacts.

Explanation:

Period 7 of the periodic table is filled up to atomic - number 118. Element 119 would start a new period (Period 8). Non - metals are located on the right side of the periodic table. A full valence shell is characteristic of noble gases. Metals tend to lose electrons and form cations. Since element 119 would be a metal (as it is likely to be on the left - hand side of the new period), it would most likely form cations when it reacts.

Answer:

It would most likely form cations when it reacts.