Which determines the reactivity of an alkali metal?

Question

its boiling and melting points
the shininess of its surface
the number of protons it has
its ability to lose electrons

Answer 1

The reactivity of an alkali metal is primarily determined by its ability to lose electrons. Alkali metals have a single electron in their outermost shell, making them highly reactive, as they tend to lose that electron easily to achieve a stable electron configuration. This characteristic is what leads to their vigorous reactions with water, halogens, and various substances. Other factors, like boiling and melting points, and the shininess of their surface, do not directly determine reactivity. The number of protons does correlate with the type of alkali metal, but it is not a direct determinant of reactivity.