Chapter 21 Practice Questions

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Chapter 21MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the ) In balancing the nuclear reaction 29392U 23490E + 42He, the identity of element E is __________ .A) ) ) ) ) )2)This reaction is an example of 20682Pb + __________A)alpha decayB)positron emissionC)gamma emissionD)beta emissionE)electron capture2)3)The missing product from this reaction is12153I 12152Te + __________A)0 1eB)00 C)42HeD)10nE)01e3)4)This reaction is an example of 4119K + __________A)alpha decayB)beta decayC)positron decayD)gamma emissionE)electron capture4)5)The missing product in this reaction would be found in which group of the periodic table? 2411Na 0 1e + __________A)3AB)7AC)1AD)8AE)2A5)16)The missing product in this reaction combines with oxygen to form a compound with the formula 4219K 0 1e + __________A)MO2B)M2OC)M3O2D)MOE)M2O36)7) Radium undergoes alpha decay.

mg sample of cesium 137 to 8.7 mg? A)32 B)3.2 C)52 D)50 E)46 35) 36)The half-life for beta decay of strontium-90 is 28.8 years. A milk sample is found to contain 10.3 ppm strontium-90. How many years would pass before the strontium-90 concentration would ...

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