Question

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

Explanation:

Step1: Recall metal - reactivity series

Elements in group 1 and 2 of the periodic table are highly reactive. Strontium (Sr) is in group 2.

Step2: Analyze other metals

Technetium (Tc) is a transition - metal and silver (Ag) is also a transition - metal. Silver is relatively less reactive among common metals. Technetium is more reactive than silver but less reactive than strontium.

Answer:

Silver: 3
Strontium: 1
Technetium: 2