Question

comparing reactivity of different metals
rank the metals from most reactive (1) to least reactive (3).
silver:
strontium:
technetium:

Explanation:

Metal reactivity is determined by the metal activity series. Alkaline earth metals (like strontium) are highly reactive. Transition metals like technetium are moderately reactive, while noble metals like silver are the least reactive among the three.

Answer:

Silver: 3
Strontium: 1
Technetium: 2