Which statement about subatomic particles is true? a. unlike protons or neutrons, electrons have no mass. b. an electron has far less mass than either a proton or neutron. c. neutrons have no charge and no mass. d. protons, neutrons, and electrons all have about the same mass.

Brian has a medical condition called cone dystrophy, which is a disorder of the cone cells in the eye. what symptoms would you expect brian to have? a. inability to see in the dark b. difficulty determining colors c. difficulty determining shapes and outlines d. inability to see in all light conditions