How do you classify elements into metals and non metals on the basis of their electronic configuration? Choose metal and non metal out of the following?
`11^23A,_ 9^19B,_12^24C,_15^31D,_17^35E`

Explanation

To classify the elements into metals and non-metals based on their electronic configuration, we will follow these steps:

### Step 1: Identify the Atomic Numbers and Write Electronic Configurations
We start by identifying the atomic numbers of the elements given and writing their electronic configurations.

- **Element A**: Atomic number = 11
- Electronic configuration: 1s² 2s² 2p⁶ 3s¹ (which can be simplified to [Ne] 3s¹)

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