Plutonium-238 Is an  Emitter and a Compact Heat

question 96

Multiple Choice

Plutonium-238 is an  emitter and a compact heat source. Coupled with a PbTe thermoelectric device, it is used as a very reliable electrical energy source for cardiac pacemakers. It has a half-life of 86 years and an atomic weight of 238.0495 g/mol. One mol is equal to 6.02  10²³ atoms. If 100.0 grams of ²³⁸Pu were used in a pacemaker, how many  particles would it produce in 10 years?

• A) 6.02  10²³
• B) 3.01  10²³
• C) 3.01  10²²
• D) 1.96  10²²
• E) 2.33  10²³

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