The element whose electronic configuration is `1s^(2), 2s^(2)2p^(6), 3s^(2)` is a`//`an

Options

A. metal
B. inter gas
C. metalloid
D. non-metal

Answer

To determine the type of element with the electronic configuration `1s² 2s² 2p⁶ 3s²`, we can follow these steps:

### Step 1: Count the Total Number of Electrons
The electronic configuration `1s² 2s² 2p⁶ 3s²` indicates the distribution of electrons in various energy levels:
- `1s²` has 2 electrons
- `2s²` has 2 electrons
- `2p⁶` has 6 electrons
- `3s²` has 2 electrons

Adding these together:
\[ 2 + 2 + 6 + 2 = 12 \text{ electrons} \]

### Step 2: Identify the Element
The total number of electrons corresponds to the atomic number of the element. An atomic number of 12 indicates that the element is Magnesium (Mg).

### Step 3: Determine the Group and Period
Magnesium is located in Group 2 (the alkaline earth metals) of the periodic table and is in Period 3.

### Step 4: Classify the Element
As an alkaline earth metal, Magnesium has the following characteristics:
- It is a metal.
- It tends to lose two electrons to form a \( \text{Mg}^{2+} \) ion.
- It has low ionization energy compared to non-metals.

### Conclusion
Based on the electronic configuration and the properties of the element, we can conclude that the element is a **metal**.

### Final Answer
The element whose electronic configuration is `1s² 2s² 2p⁶ 3s²` is a **metal**.

---