Question

which of these elements is the most chemically reactive?
a. germanium (ge)
b. iron (fe)
c. zinc (zn)
d. potassium (k)

Explanation:

Potassium is an alkali - metal. Alkali metals are highly reactive due to having only one valence electron, which they readily lose to achieve a stable electron configuration. Germanium is a metalloid, iron is a transition metal, and zinc is also a transition - metal, all of which are less reactive than potassium in comparison.

Answer:

D. Potassium (K)