If IUPAC name of an element is "unununium" then correct statement regarding element is:

Options

A. it is inner transition element
B. it belongs to 8th period in periodic table
C. it is a non-transition element
D. it is transition element

Explanation

To solve the question regarding the element with the IUPAC name "unununium," we will follow these steps:

### Step 1: Determine the Atomic Number
The name "unununium" corresponds to the atomic number 111. This is derived from the Latin roots where "un" means one, so "unununium" translates to 1-1-1, which equals 111.

### Step 2: Write the Electronic Configuration
For an atomic number of 111, we need to determine its electronic configuration. The electronic configuration can be constructed as follows:
- The element with atomic number 111 is placed in the 7th period and belongs to the d-block.
- The electronic configuration for atomic number 111 is:
\[ [Rn] 5f^{14} 6d^{10} 7s^{1} \]
Here, [Rn] represents the electron configuration of Radon (atomic number 86).

### Step 3: Identify the Period Number
The period number corresponds to the highest principal quantum number (n) in the electronic configuration. In this case, the highest n is 7 (from the 7s electron). Therefore, the period number is 7.

### Step 4: Identify the Group Number
To find the group number for a d-block element, we use the formula:
\[ \text{Group number} = \text{Number of } ns \text{ electrons} + \text{Number of } (n-1)d \text{ electrons} \]
For our element:
- ns electrons = 1 (from 7s)
- (n-1)d electrons = 10 (from 6d)

Thus, the group number is:
\[ 1 + 10 = 11 \]

### Step 5: Classify the Element
Since the element has its outermost electrons in the d subshell and belongs to the group 11, it is classified as a d-block element, specifically a transition metal.

### Final Conclusion
The correct statement regarding the element "unununium" (atomic number 111) is that it is a d-block element (transition metal) and belongs to group 11 and period 7.