Write the electronic configuration of potassium

Explanation

To write the electronic configuration of potassium, we need to follow these steps:

### Step 1: Identify the Atomic Number
The atomic number of potassium (K) is 19. This means that a neutral potassium atom has 19 electrons.

### Step 2: Understand Electron Shells and Subshells
Electrons are arranged in shells around the nucleus. The order of filling is based on the increasing energy levels of the orbitals. The order of filling is generally:
1. 1s
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