Question

what do all alkali metals (group 1) have in common? they are gases at room temperature two valence electrons seven valence electrons one valence electron

Explanation:

Alkali metals are in Group 1 of the periodic table. Elements in the same group have the same number of valence electrons. Group 1 elements have one valence electron. They are solids at room - temperature, not gases. And they do not have two or seven valence electrons.

Answer:

One valence electron