Write the electronic configuration of the elements with the atomic number `61,91,101` and `109`.

Explanation

To write the electronic configurations of the elements with atomic numbers 61, 91, 101, and 109, we will follow the Aufbau principle, Hund's rule, and the Pauli exclusion principle. Let's break down the electronic configurations step by step.

### Step 1: Identify the elements and their atomic numbers
- Atomic number 61: Promethium (Pm)
- Atomic number 91: Protactinium (Pa)
- Atomic number 101: Mendeleevium (Md)
- Atomic number 109: Meitnerium (Mt)

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