Find the wavelength of radiation required to excite an electron in the ground levelll of `Li^(2+) (z = 3)` in the third energy level

Explanation

To find the wavelength of radiation required to excite an electron in the ground level of \( \text{Li}^{2+} \) (where \( Z = 3 \)) to the third energy level, we can follow these steps:

### Step 1: Identify the energy levels
The ground state corresponds to \( n_1 = 1 \) and the excited state corresponds to \( n_2 = 3 \).

### Step 2: Use the Rydberg formula
The energy difference between the two levels can be calculated using the modified Rydberg formula:

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