Question

Write the nomenclature and symbol of an element having atomic number 119?

Answer 1

Periodic table is basically an arrangement of all the elements in accordance with their increasing atomic number and recurring chemical properties. To solve this question, we need to know the series of elements in the periodic table and their different types of behavior and properties.

Complete step by step answer:
The elements in the periodic table are arranged from left to right and top to bottom in the order of their increasing atomic numbers. Thus, the elements in the same group will have the same valence electron configuration and hence, similar chemical properties. Whereas, the elements in the same period will have an increasing order of valence electrons. So, as the energy level of the atom increases, the number of energy sub-levels per energy level increases.
Moreover, the first 94 elements of the periodic table are naturally occurring while the rest from 95-118 have only been synthesized in laboratories or nuclear reactors. Now, Dmitri Mendeleev is known as the father of the periodic table.
However, the periodic table has only 118 elements till now. The new elements with very high atomic numbers are so unstable that only minute quantities sometimes only a few atoms of them are obtained. According to the IUPAC rules for naming, the ${119^{th}}$ element is un-un-ennium. It is the hypothetical chemical element with the symbol Use. Moreover, in the periodic table, it is expected to be an s-block element, an alkali metal and the first element of the eighth period. It is the lightest element that has not yet been synthesized.
Hence, the name of the ${119^{th}}$ element is ununennium and its symbol is ‘Uue’.

Note: Due to the stabilization of its outer 8s electron, ununennium’s first ionization energy i.e. the energy required to remove an electron from a neutral atom is predicted to be 4.53eV. Moreover, its electron affinity is expected to be far greater than that of cesium and francium.