UNIT 7 NUCLEAR REACTIONS 7 UNIT 7 NUCLEAR REACTIONS 7.5 What is Nuclear Fission, Nuclear Fusion and common uses of Nuclear Reactions? April 20, 2010 AIM: What are fission and fusion and what are the common uses of nuclear reactions? DO NOW: QUIZ (5 minutes) A

TYPES OF NUCLEAR REACTIONS DECAY MODE β- β+ α γ FISSION FUSION NEUTRON CAPTURE ARTIFICIAL

Nuclear Fission Heavy slow

EXAMPLE 235 U + n  91 Kr + 142 Ba + n 3 292 1 236 56 1

Nuclear Fusion different isotopes

EXAMPLE 2 H + 2 H  4 He + energy 1 1 2

How do Fission and Fusion reactions produce energy? What powers the sun? 1 H +  4 4 He + e 2 + energy 1 2 1

1.00718 ~0 4.00150 4 x (1.00718)= 4.02872amu 4.00150amu No, they are not equal

Where does energy come from? This “missing” mass is called the Mass of defect and it is the amount of mass that was converted to energy. The energy comes from conversion of HYDROGEN to HELIUM

EVERYDAY USES OF RADIOISOTOPES Complete the reading and fill the chart

INDEPENDENT PRACTICE Complete the PRACTICE section Please complete the classwork