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The corresponding graph shows a group of points (a, b, c, d), which
represent the number of original nuclei (N) for the elements and the half-life
(T1/2) for each of them.
Nx106
20
16
12
8
4
50
Show Transcribed Text
G
II
a
100
C
1- What elements have equal radioactivity?
150
d
b
H
200
T12 (day)

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