In[]:=
EntityListEntityClass"Isotope","HalfLife"->Between
1.*^6
yr
,
1.*^8
yr

Out[]=

beryllium-10
,
manganese-53
,
iron-60
,
zirconium-93
,
niobium-92
,
technetium-97
,
technetium-98
,
palladium-107
,
iodine-129
,
cesium-135
,
samarium-146
,
gadolinium-150
,
dysprosium-154
,
hafnium-182
,
lead-205
,
uranium-236
,
neptunium-237
,
plutonium-244
,
curium-247

In[]:=
Dataset[EntityValue[%,{"Name","HalfLife"}]]
Out[]=
beryllium-10
1.4Myr
manganese-53
4.Myr
iron-60
2.6Myr
zirconium-93
1.6Myr
niobium-92
3.×
1
10
Myr
technetium-97
4.Myr
technetium-98
4.Myr
palladium-107
7.Myr
iodine-129
16.Myr
cesium-135
1.Myr
samarium-146
7.×
1
10
Myr
gadolinium-150
1.8Myr
dysprosium-154
0.Myr
hafnium-182
8.9Myr
lead-205
17.Myr
uranium-236
23.4Myr
neptunium-237
2.14Myr
plutonium-244
81.Myr
curium-247
16.Myr
In[]:=
EntityListEntityClass"Isotope","HalfLife"->Between
1.*^8
yr
,
1.*^13
yr

Out[]=

potassium-40
,
rubidium-87
,
lanthanum-138
,
samarium-147
,
lutetium-176
,
rhenium-187
,
osmium-184
,
platinum-190
,
thorium-232
,
uranium-235
,
uranium-238

In[]:=
Dataset[EntityValue[%,{"Name","HalfLife"}]]
Out[]=
potassium-40
1.25Gyr
rubidium-87
50.Gyr
lanthanum-138
1.0×
11
10
yr
samarium-147
1.07×
11
10
yr
lutetium-176
37.Gyr
rhenium-187
41.6Gyr
osmium-184
1.×
13
10
yr
platinum-190
4.8×
11
10
yr
thorium-232
14.Gyr
uranium-235
0.70Gyr
uranium-238
4.46Gyr
In[]:=
ListLogPlotCallout[{#1,#2},#3]&@@@EntityValueEntityClass"Isotope","HalfLife"->Between
1.*^6
yr
,
1.*^13
yr
,{"AtomicMass","HalfLife","Symbol"},AxesLabel->Automatic
Out[]=