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 break down the information provided step by step.

### Step-by-Step Solution:

1. **Understanding the Symbols**:
- The symbol of an element is generally represented as \( _{Z}^{A}X \).
- Here, \( Z \) represents the atomic number, and \( A \) represents the mass number.

2. **Defining Atomic Number (Z)**:
- The atomic number \( Z \) is defined as the number of protons in the nucleus of an atom.
- It is also equal to the number of electrons in a neutral atom.

3. **Defining Mass Number (A)**:
- The mass number \( A \) is the total number of protons and neutrons in the nucleus.
- It can be expressed as:
\[ A = \text{Number of Protons} + \text{Number of Neutrons} \]

4. **Relationship Between Protons, Neutrons, and Electrons**:
- In a neutral atom, the number of protons equals the number of electrons.
- Therefore, if \( Z \) is the number of protons, then the number of electrons is also \( Z \).

5. **Final Representation**:
- The general representation of the symbol of element 'X' can be summarized as:
\[ X = \frac{A}{Z} \]
- This indicates that the element 'X' has a mass number \( A \) and an atomic number \( Z \).

6. **Conclusion**:
- The general representation of the symbol of element 'X' is \( _{Z}^{A}X \), where \( Z \) is the atomic number and \( A \) is the mass number.