Why is electronic configuration `1s^2 2s^2 2p^6 3s^2 3p^6 3d^4 4s^2 ` not correct for the ground state of Cr(24) ?

Explanation

To understand why the electronic configuration `1s^2 2s^2 2p^6 3s^2 3p^6 3d^4 4s^2` is not correct for the ground state of chromium (Cr, atomic number 24), we need to analyze the electronic configuration of chromium step by step.

### Step 1: Determine the Total Number of Electrons
Chromium has an atomic number of 24, which means it has 24 electrons.

### Step 2: Write the Expected Electronic Configuration
The expected electronic configuration, following the Aufbau principle, would be:
- `1s^2`
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