electric power plants that use nuclear fission reactions rely on a controlled self sustaining chain reaction of splitting atoms. by examining the diagram for nuclear fission, explain how a chain reaction might occur. explain why is it important to control the rate of the chain reaction

they emit helium gas that attaches to nearby planets.

they remove low-mass elements from the planets’ crust.

they cause nuclear fusion inside the inner core of planets.

they produce heavy elements such as iron and gold.

explanation:

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be