In the periodic table the element having the highest first ionization enthalpyis ………..

Explanation

To determine the element with the highest first ionization enthalpy in the periodic table, we can follow these steps:

### Step 1: Understand Ionization Enthalpy
Ionization enthalpy (or ionization energy) is defined as the minimum amount of energy required to remove an electron from the outermost shell of an isolated gaseous atom.

**Hint:** Remember that ionization energy increases as you move from left to right across a period and decreases as you move down a group in the periodic table.

### Step 2: Identify Trends in the Periodic Table
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