What would be the `IUPAC` name and symbol for the element with atomic number `109`?

Answer

To find the IUPAC name and symbol for the element with atomic number 109, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Atomic Number**: The atomic number given is 109.

2. **Break Down the Atomic Number**: Since the atomic number is greater than 100, we will use a specific nomenclature system for naming the element. This system involves breaking down the digits of the atomic number into their respective names and symbols.

3. **Assign Names to Each Digit**:
- For the digit **1** (hundreds place), the name is **"un"**.
- For the digit **0** (tens place), the name is **"nil"**.
- For the digit **9** (units place), the name is **"enn"**.

4. **Combine the Names**: We combine the names of the digits to form the IUPAC name. The combined name is:
- "un" + "nil" + "enn" = **"unnilennium"**.

5. **Determine the Symbol**: The symbol is derived from the names of the digits:
- For "un", the symbol is **U**.
- For "nil", the symbol is **N**.
- For "enn", the symbol is **E**.
- Therefore, the symbol for element 109 is **U** + **N** + **E** = **U**N**E**.

### Final Answer:
- **IUPAC Name**: Unnilennium
- **Symbol**: UNE