math algebra
sarahmazin
problemlist-DF5_MAT-121-nov18.docxMAT-121: COLLEGE ALGEBRA
Element Table for Discussion Forum 5
Pick an element from the list below. Post a message to the discussion forum indicating which element you have chosen so that other classmates will know to select other elements.
|
Element/Isotope |
Half-Life |
|
Barium (Ba) 133 |
10.5 years |
|
Bismuth (Bi) 207 |
38 years |
|
Cerium (Ce) 144 |
284 days |
|
Cesium (Cs) 137 |
30.17 years |
|
Krypton (Kr) 85 |
10.72 years |
|
Polonium (Po) 210 |
138 days |
|
Plutonium (Pu) 238 |
87.75 years |
|
Plutonium (Pu) 239 |
24100 years |
|
Plutonium (Pu) 240 |
6500 years |
|
Radium (Ra)226 |
1600 years |
|
Ruthenium (Ru) 106 |
367 days |
|
Thorium (Th)229 |
7340 years |
|
Thorium (Th) 230 |
77,000 years |
|
Manganese (Mn) 54 |
313 days |
|
Niobium (Nb)b94 |
20,000 years |
|
Actinium (Ac) 227 |
21.77 years |
|
Antimony (Sb) 124 |
60.20 days |
|
Gadolinium 153 |
242 days |
|
Cobalt (Co) 57 |
270 days |
