looking for ppl to have fun in a z00m w anyone down only 2 requirements are 14-16, and u have to be lgbtq. UWU

The answer is joseph is observing the colour of the reaction mixture to see whether proteins are present in the given solution.

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass