The electronic configuration of some elements are given below:
(i) `1s^(2) 2s^(2)` (ii) `1s^(2) 2s^(2) 2p^(6)`
(iii) `1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(5)`
(iv) `1s^(2) 2s^(2) 2p^(1)`
Which does have the highest IE ?

Explanation

To determine which element has the highest ionization energy (IE) from the given electronic configurations, we can follow these steps:

### Step 1: Understand Ionization Energy (IE)
Ionization energy is the energy required to remove the outermost electron from an atom. Generally, elements with a stable electronic configuration (like noble gases) have higher ionization energies.

### Step 2: Identify the Elements from the Electronic Configurations
1. **Configuration (i)**: `1s² 2s²`
- This corresponds to Beryllium (Be).
...