Achemical reaction is a process in which

A chemical reaction is a process in which one or more substances, called reagents, are transformed into products

Explanation:

The most common definition of a chemical reaction is that it is a process in which one or more substances, called reagents, are transformed into another or other substances with different properties, called products.  During a chemical reaction, the bonds between the atoms that constitute the reagents are broken. Then, the atoms are reorganized in another way, forming new bonds and giving rise to one or more substances different from the initial ones.

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.

answer:

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