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Câu hỏi: Phản ứng hạt nhân nào sau đây là quá trình phóng xạ?
A. ${}_{0}^{1}n+{}_{92}^{139}U\to {}_{38}^{95}Sr+2{}_{0}^{1}n.$
B. ${}_{1}^{3}H+{}_{1}^{2}H\to {}_{2}^{4}He+{}_{0}^{1}n.$
C. ${}_{-0}^{1}n+{}_{92}^{235}U\to {}_{56}^{144}Ba+{}_{36}^{89}Kr+3{}_{0}^{1}n.$
D. ${}_{84}^{210}Po\to {}_{2}^{4}He+{}_{87}^{206}Pb.$
A. ${}_{0}^{1}n+{}_{92}^{139}U\to {}_{38}^{95}Sr+2{}_{0}^{1}n.$
B. ${}_{1}^{3}H+{}_{1}^{2}H\to {}_{2}^{4}He+{}_{0}^{1}n.$
C. ${}_{-0}^{1}n+{}_{92}^{235}U\to {}_{56}^{144}Ba+{}_{36}^{89}Kr+3{}_{0}^{1}n.$
D. ${}_{84}^{210}Po\to {}_{2}^{4}He+{}_{87}^{206}Pb.$
HD:
Đáp án D.