Chemistry

Question Analysis
This question involves identifying the element group with the lowest first ionization energies overall. The main focus is on linking group number and valence electron count to ionization energy.

Key Concept Explanation
Elements with fewer valence electrons have lower ionization energies because they can easily lose electrons to achieve a stable electron configuration.
Group 1 elements (alkali metals) have only 1 valence electron, which is held very weakly compared to elements in other groups. This makes their first ionization energy the lowest of all main groups.

Step-by-Step Solution
1. Recall the valence electron count for each group:
Group 1: 1 valence electron
Group 2: 2 valence electrons
Group 16: 6 valence electrons
Group 17: 7 valence electrons
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