Element 'X' has twelve protons in its nucleus. To which group of the periodic table it will belong?

Options

A. 1
B. 2
C. 6
D. 8

Answer

To determine the group of the periodic table to which element 'X' belongs, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Atomic Number**:
- The number of protons in the nucleus of element 'X' is given as 12.
- The atomic number of an element is equal to the number of protons. Therefore, the atomic number of element 'X' is 12.

2. **Determine the Electronic Configuration**:
- The electronic configuration of an element describes how the electrons are distributed in the atomic orbitals.
- For an atomic number of 12, we fill the electrons in the order of increasing energy levels:
- The first shell (K shell) can hold a maximum of 2 electrons: **2**
- The second shell (L shell) can hold a maximum of 8 electrons: **8**
- The third shell (M shell) can hold a maximum of 18 electrons, but we only need to fill 2 more to reach a total of 12: **2**
- Thus, the electronic configuration of element 'X' is: **1s² 2s² 2p⁶ 3s²**.

3. **Identify the Valence Electrons**:
- The valence electrons are the electrons in the outermost shell.
- For element 'X', the outermost shell (3s) has 2 electrons.

4. **Determine the Group Number**:
- The group number in the periodic table can often be determined by the number of valence electrons.
- Since element 'X' has 2 valence electrons, it belongs to **Group 2** of the periodic table.

### Conclusion:
Element 'X' with 12 protons belongs to **Group 2** of the periodic table.

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