Question

in the 1890s, j j thomson applied a strong voltage of electricity to a collection of identical atoms. a ray appeared that was attracted to a positive magnet but repelled by a negative magnet. the collection of atoms lost a very small amount of mass after the ray appeared. based on the characteristic of the ray and the effect on the mass of the atoms, what subatomic particle was most likely composing the ray? proton neutron electron photon

Explanation:

Electrons are negatively - charged subatomic particles. They are attracted to positive magnets and repelled by negative magnets. Also, electrons have a very small mass compared to protons and neutrons. Photons are mass - less and not subatomic particles in the traditional sense related to the structure of atoms. Neutrons are neutral and not affected by magnetic fields in the way described. Protons are positively - charged and would be attracted to negative magnets and repelled by positive magnets.

Answer:

B. electron