Ineed like right ! 1. even though numerous safety devices are designed into nuclear power plants, the benefits must be weighed against potential hazard risk of accident waste disposal all of the above 2. the current major disadvantage of using solar power on a large scale is safety reliability economics lack of consistent sunlight. 3. two advantages of hydroelectric power are no ecological impact nonpolluting relatively low cost can be developed anywhere 4. the nucleus contains protons and neutrons protons and electrons neutrons and electrons protons and isotopes