Imagine an element, X, that has two naturally occurring isotopes. If you know the mass and the percentage
abundance of one of the isotopes, how would you
determine the percent abundance of the other isotope?
Describe your problem-solving process

Ascientist conducted an experiment and discovered that certain plants grow faster when given a particular amount of fertilizer. anouther scientist conducted the same experiment and got similar results. which concept does this best illustrate? a) repetition b) replication c) precision d) validity