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BCS10 C07 F 3/11/08 4:54 PM Page 302 7.2 Half-Life · Half-Lives Time (y) Strontium-90 Present 00 100%10.0 g 129 50%10.0 g 5.00 g 258 25%10.0 g 2.50 g 387 12.5%10.0 g 1.25 g 4116
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