Question

which group of elements contains the most reactive metals?
a. metalloids
b. alkali metals
c. transition metals
d. alkaline earth metals

Explanation:

Alkali metals have one valence - electron which they can easily lose to form positive ions. This makes them highly reactive among metals. Metalloids are not metals. Transition metals and alkaline earth metals are less reactive than alkali metals.

Answer:

B. alkali metals