Question

The element 119 has not been discovered. What would be IUPAC name and symbol for this element? On the basis of the periodic table, predict the electronic configuration of this element and also the formula of its most stable chloride and oxide.

Answer 1

For the elements while naming it each number will have a particular name like nil for 0, Un for 1, bi for 2, tri for 3, quad for 4, pent for 5, hex for 6, sept for 7, oct for 8 and enn for 9 and the name should end with ‘ium’.

Complete step by step answer:
For the elements having atomic numbers greater than 100. Each number has a certain name as
0-nil, 1-Un, 2-bi, 3-tri, 4-quad, 5-pent, 6-hex, 7-sept, 8-oct, 9-enn and at the end we need to add ium.
Thus the IUPAC name for the element 119 is Ununennium. The symbol for this element is uue and has a predicted electronic configuration of 2, 8, 18, 32, 32, 18, 8, and 1. ${{\text{M}}_{\text{2}}}{\text{O}}$ and ${\text{MCl}}$ are the formula of its most stable oxide and chloride.

Additional information:
The predicted oxidation state for Ununennium is (+1), (+3) and has a electronegativity of 0.86 in Pauling scale, the expected first and second ionization energy, atomic radius and covalent radius are ${\text{463}}{\text{.1 kJ/mol, 1698}}{\text{.1 kJ/mol, 240 pm, 263 - 281 pm}}$. Ununennium is predicted to have a valence electronic configuration of ${\text{8}}{{\text{s}}^{\text{1}}}$. The spin orbit interaction is the major difference between Ununennium and other alkali metals. Three isotopes of Ununennium have been predicted.

Note: Element 119 is also known as francium. It is expected to be the first element in the eighth period and is expected to be a alkali metal, it may have a predicted melting point of ${\text{0 - 30}}{{\text{ }}^{\text{o}}}{\text{C}}$ and a predicted boiling point of ${\text{630}}{{\text{ }}^{\text{o}}}{\text{C}}$ with a density and heat of fusion of ${\text{3 g/c}}{{\text{m}}^{\text{3}}}{\text{, 2}}{\text{.01 - 2}}{\text{.05 kJ/mol}}$.