Question

The IUPAC symbol for the element with atomic number $119$ would be :

• A. unh
• B. uun
• C. une
• D. uue

Answer 1

The Correct Option is D

The question asks us to determine the IUPAC name of the element with atomic number 119. The International Union of Pure and Applied Chemistry (IUPAC) has a convention for naming elements based on their atomic numbers, especially for elements that are yet to be discovered.

1. The IUPAC systematic element naming convention is based on using numerical roots for each digit of the atomic number followed by the suffix "-ium". The roots for numbers 0 through 9 are:
   • 0: nil
   • 1: un
   • 2: bi
   • 3: tri
   • 4: quad
   • 5: pent
   • 6: hex
   • 7: sept
   • 8: oct
   • 9: enn
2. For atomic number 119, we break it down into its digits: 1, 1, and 9.
3. Using the IUPAC roots:
   • The first 1 is "un".
   • The second 1 is also "un".
   • The 9 is "enn".
4. Combining these roots gives us the name: "ununennium".
5. The symbol for "ununennium" based on IUPAC naming would be "Uue" - the first letter of each root minus "nium" and in lowercase.

Therefore, the IUPAC symbol for the element with atomic number 119 is "uue".