Electrons jump from fourth energy level to finally first energy level in one mole hydrogen atom. How many maximum possible numbers of photons can be emitted?

Explanation

To solve the problem of how many maximum possible numbers of photons can be emitted when electrons jump from the fourth energy level to the first energy level in one mole of hydrogen atoms, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Energy Levels**: In a hydrogen atom, the energy levels are denoted by principal quantum numbers (n). Here, we have n1 = 1 (ground state) and n2 = 4 (excited state).

2. **Use the Formula for Maximum Photons**: The formula to calculate the maximum number of photons emitted when an electron transitions from a higher energy level (n2) to a lower energy level (n1) is given by:
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