Question

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

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?
a. it would be a nonmetal.
b. it would be placed into period 7.
c. it would have a full valence shell of electrons.
d. it would most likely form cations when it reacts.

question 14 of 15

Explanation:

The atomic number 119 would be a new element. In the periodic table, as atomic number increases, elements follow trends. Elements with high atomic numbers are likely to be metals. A full - valence shell is characteristic of noble gases and not of new, high - atomic - number elements. Nonmetals are usually found on the right side of the periodic table and new high - atomic - number elements are more likely to be metals that form cations. Period 7 is already filled up to atomic number 118, so a new element with atomic number 119 would start a new period.

Answer:

D. It would most likely form cations when it reacts.