1.
(2024高三上·南昌月考)
2024年是中國航天大年,神舟十八號、嫦娥六號等已陸續(xù)飛天,部分航天器裝載了具有抗干擾性強(qiáng)的核電池。已知
Sr衰變?yōu)?img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmsubsup%3E%3Cmrow%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmn%3E39%3C%2Fmn%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmn%3E90%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmsubsup%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">Y的半衰期約為29年;
Pu衰變?yōu)?img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmsubsup%3E%3Cmrow%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmn%3E92%3C%2Fmn%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmn%3E234%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmsubsup%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">U的半衰期約87年?,F(xiàn)用相同數(shù)目的
Sr和
Pu各做一塊核電池,下列說法正確的是( ?。?