Question

The table below shows the half-lives of four radioactive materials.

Radioactive material Half-lives
Iodine-131 8.07 days
Sodium-24 15 hours
Bismuth-212 60.5 seconds
Strontium-90 29 years

Based on the table, which of these best orders the materials from the slowest to the fastest rate of decay?

Iodine-131 → Sodium-24 → Strontium-90 → Bismuth-212

Bismuth-212 → Strontium-90 → Sodium-24 → Iodine-131

Bismuth-212 → Sodium-24 → Iodine-131 → Strontium-90

Strontium-90 → Iodine-131 → Sodium-24 → Bismuth-212

Answer 1

Strontium-90 → Iodine-131 → Sodium-24 → Bismuth-212

Answer 2

thank you.