What type of compounds are compared in the law of multiple proportions

The law of multiple proportions, states that when two elements combine to form more than one compound, the mass of one element, which combines with a fixed mass of the other element, will always be ratios of whole numbers.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter