What is the name of element with atomic number 105

Options

A. Kurchatovium
B. Dubnium
C. Nobelium
D. Holmium

Explanation

To determine the name of the element with atomic number 105, we can follow these steps:

### Step 1: Identify the atomic number
The atomic number given in the question is 105.

### Step 2: Refer to the periodic table
We need to refer to the periodic table of elements to find the element corresponding to atomic number 105.

### Step 3: Locate element 105
Upon checking the periodic table, we find that the element with atomic number 105 is Dubnium.

### Step 4: Confirm the name and symbol
The name of the element is Dubnium, and its chemical symbol is Db.

### Step 5: Review the electronic configuration
For further understanding, the electronic configuration of Dubnium is:
\[ \text{Rn} \, 5f^{14} \, 6d^3 \, 7s^2 \]
This indicates that Dubnium is a transition metal located in the d-block of the periodic table.

### Final Answer
The name of the element with atomic number 105 is **Dubnium**.

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