Radioisotope calculator

Calculates fraction of radioactivity remaining after specified time
Time   days
Isotope
Tritium (3H) Carbon-14 Sodium-22
Aluminum-26 Phosphorus-32 Phosphorus-33
Sulfur-35 Argon-37 Potassium-40
Calcium-45 Chromium-51 Nickel-56
Iron-59 Cobalt-60 Rubidium-86
Strontium-90 Iodine-125 Iodine-131