The first `(IE_1)` and second `(IE_2)` ionisation enthalpies `("kJ mol"^(-1))` of a few elements designated by Roman numerals are shown below.
`{:(,,IE_(1),IF_(2)),(,I,2372,5251),(,III,900,1760):}` `{:(,,IE_(1),IE_(2)),(,II,520,7300),(,IV,1680,3380):}`
Which of the above element is likely to be:
a reactive metal

Explanation

To determine which element is likely to be a reactive metal based on the given ionization enthalpy values, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Ionization Energy**:
- Ionization energy (IE) is the energy required to remove an electron from an atom. The first ionization energy (IE1) refers to the energy needed to remove the first electron, while the second ionization energy (IE2) refers to the energy needed to remove the second electron.

2. **Identify the Given Values**:
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