Element 120 IUPAC Provisional Name Determination

This question asks us to identify the correct IUPAC provisional name for the element that has the atomic number $120$. The International Union of Pure and Applied Chemistry (IUPAC) uses a special system to assign temporary names to elements that have been discovered or synthesized but not yet officially recognized and named. These provisional names are based purely on the atomic number.

IUPAC Provisional Naming System Explained

The IUPAC system uses a set of standard abbreviations (roots) that correspond to the digits of the atomic number. These roots are then concatenated in order, and the suffix '-ium' is added at the end. This creates a unique, temporary name for the element.

Here is a breakdown of the digits and their corresponding IUPAC roots:

Atomic Number 120 Provisional Name Derivation

To determine the provisional name for the element with atomic number $120$, we follow these steps:

• Identify the digits in the atomic number $120$. The digits are 1, 2, and 0.
• Find the corresponding root for each digit using the table above:
  • 1 corresponds to 'un'
  • 2 corresponds to 'bi'
  • 0 corresponds to 'nil'
• Combine the roots in order: Un + bi + nil = Unbinil.
• Add the standard suffix '-ium' to the combined roots.

This results in the IUPAC provisional name: Unbinilium.

Provisional Name Options Comparison

Now, let's look at the options provided and see how they match our derived name:

• Option 1: Unbinilium - This matches the name derived using the IUPAC system for atomic number $120$.
• Option 2: Unbinnium - This is not the correct combination according to the IUPAC rules.
• Option 3: Unnilbium - This provisional name corresponds to atomic number 102 (Un-nil-bi-um).
• Option 4: Unbiunium - This provisional name corresponds to atomic number 121 (Un-bi-un-ium).

Therefore, the correct IUPAC provisional name for the element with atomic number $120$ is Unbinilium.