Find the atomic number of atom when given that its ionisation potential is equal to 122.4 V .

Explanation

To find the atomic number of an atom given its ionization potential of 122.4 V, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Ionization Potential**:
The ionization potential (IP) is the energy required to remove an electron from an atom in its gaseous state. In this case, the ionization potential is given as 122.4 V.

2. **Convert Ionization Potential to Electron Volts**:
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