These particles are located on the outside of the atom. (check all that apply) protons
neutrons
electrons

should be electrons

Explanation:

i think i did a lesson on this a few weeks ago, let me know if i'm wrong.

Electrons

They are on the outside of an atom while protons and neutrons are on the inside in the nuclues

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

the correct answer is b