You are given five neutral atoms A, B, C, D and E having the following electronic configuration :
` A-1s^2 2s^2 2p^6 3s^2 , B-1s^2 2s^2 sp^6 3s^1 ,C-1s^2 2s^2 2p^1`
` D-1s^2 2s^2 , E- 1s^2 2s^2 2p^6`
Write the empirical formulae for the substances containing:
only E

Explanation

To solve the problem, we need to analyze the electronic configuration of the atom E and determine its properties.

### Step-by-Step Solution:

1. **Identify the Electronic Configuration of E**:
The electronic configuration of atom E is given as `1s² 2s² 2p⁶`.

2. **Determine the Atomic Number**:
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