The general representation of the symbol of element 'X' is `( Z =` Atomic number, A `=` Mass number )

Options

A. ` ._(X)^(A)Z`
B. `. _(Z)^(A)X`
C. `(A +1) ^X^(Z+1)`
D. `._(X) A^(Z)`

Answer

To solve the question regarding the general representation of the symbol of element 'X', we will follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Atomic Number (Z)**: This represents the number of protons in the nucleus of an atom. It also equals the number of electrons in a neutral atom.
- **Mass Number (A)**: This is the total number of protons and neutrons in the nucleus of an atom.

2. **General Representation**:
- The general representation of an element's symbol is written as:
\[ \text{Element Symbol} \quad \left( ^A_Z \text{X} \right) \]
- Here, \( A \) is the mass number (superscript) and \( Z \) is the atomic number (subscript).

3. **Example**:
- For example, for the element Oxygen:
- Atomic Number (Z) = 8
- Mass Number (A) = 16
- The representation would be:
\[ \text{Oxygen} \quad \left( ^{16}_{8} \text{O} \right) \]

4. **Another Example**:
- For the element Nitrogen:
- Atomic Number (Z) = 7
- Mass Number (A) = 14
- The representation would be:
\[ \text{Nitrogen} \quad \left( ^{14}_{7} \text{N} \right) \]

5. **Conclusion**:
- The correct general representation of the symbol of element 'X' is:
\[ \text{Element Symbol} \quad \left( ^A_Z \text{X} \right) \]
- Therefore, the answer to the question is option 2.