FIRST CORRECT GETS BRAINLIEST AND 25 POINTS _: Would be considered a pure element because _.
_: Would be considered a mixture of elements because _.
_: Would be considered a mixture of compounds because _.
_: Would be considered a mixture of only one type of compound because _
_.

E would be considered a pure element beacuse there's only one type of atom

B would be considered a mixture of elements because there is more than 3 elements

C would be considered a mixture of compounds because there is more than 2 compounds

A would be considered a mixture of only one type of compound because there are 2 different atoms joined together

this protocol provides a detailed procedure for co-immunoprecipitation (co-ip) to identify protein–protein interactions.

i believe the answer is a or 1