When compared to lithium, it is easier to remove valence electron from `K` (potassium) because potassium has lower ________.

Explanation

To solve the question, we need to fill in the blank regarding why it is easier to remove a valence electron from potassium (K) compared to lithium (Li).

### Step-by-Step Solution:

1. **Identify the Elements**: We are comparing lithium (Li) and potassium (K), both of which are alkali metals located in Group 1 of the periodic table.

2. **Understand Ionization Energy**: The question revolves around the concept of ionization energy, which is the energy required to remove an electron from an atom. Lower ionization energy means it is easier to remove an electron.

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