Chapter 25 Review Key terms: strong force radioactivity Transmutation half-life Cloud chamber bubble chamber Geiger counter background radiation nuclear fission nuclear fusion chain reaction critical mass tracer Tracers are used for ____________ 3 types of radiation in listed in order of penetrating power ____________ _____________ _____________ Stability of an isotope nucleus depends on ____________ When 2 small nucleus unit to form a larger nucleus-__________ Detects radiation by using a super heated liquid-_____________ Helium with 2 protons & 2 neutrons -______________ Indicates the intensity of radiation-______________ Fission & fusion both produce ___________ C-14 is used to find the age of _____________ ___________ holds the nucleus together Why is C-14 radioactive & C-12 not? Mass of an atom is located in the __________ Type of particles given off in a fission reaction-______________ What are the products of a fusion reaction? 3 uses of nuclear radiation What elements don’t exist naturally? What elements are all radioactive? Nuclear Radiation Alpha Beta symbol form cause 2 protons & 2 neutrons neutron decay into proton charge mass speed penetration what stops it effect on cells faster than alpha Gamma