The first if of potassium is `100 mol^(-1)` Calculate the lower potasible frection of light that can ionise a potassium atom

Explanation

To calculate the lowest possible frequency of light that can ionize a potassium atom given its ionization energy, we can follow these steps:

### Step 1: Convert Ionization Energy from Kilocalories to Joules
The ionization energy (IE) of potassium is given as 100 kilocalories per mole. We need to convert this to joules.

\[ \text{Ionization Energy (IE)} = 100 \, \text{kcal/mol} \times 4184 \, \text{J/kcal} \]
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