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radium C"
gen. 镭 C〃铊的同位素 Tl210
earth.sc. 镭 C"铊的同位素 Tl²¹⁰
met. 镭 C" (铊C"-210 Tl210)
radium C'
gen. 镭 C'针的同位素 Po214
earth.sc. 镭 C'针的同位素 Po²¹⁴
met. 镭 C' (钋-214,Po²¹⁴)
radium C
earth.sc. 镭 C (铋的同位素 Bi214)
met. 镭 C (钋-214,Bi²¹⁴)