Final answer:
The alkali metals would have a complete electron configuration matching the noble gas that precedes it in the periodic table if the valence electrons were gone.
Step-by-step explanation:
The alkali metals have one valence electron. If the valence electrons were gone, the alkali metals would be left with a complete inner electron configuration that matches the electron configuration of the noble gas that precedes it in the periodic table.
For example, sodium (Na) has 11 electrons and its electron configuration is [Ne]3s¹. If the valence electron is removed, sodium would have the same electron configuration as neon (Ne), which is [Ne]. Therefore, the alkali metals would be left with a complete electron configuration of the noble gas.