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Which of the following alpha decay permitted? (a) 210Bi -> 206Tl + a; (b) 203Hg ->...

Which of the following alpha decay permitted? (a) 210Bi -> 206Tl + a; (b) 203Hg -> 199Pt + a; (c) 211At -> 207Bi + a. The masses are: 210Bi: 209.984120u, 206Tl: 205.976110u, 203Hg: 202.972872u, 199Pt: 198.970593u, 211At: 210.987496u, 207Bi: 206.978471u, a : 4.002603u

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