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

Radioactive material Half-lives
Bismuth-212- 60.5 seconds
Sodium-24- 15 hours
Iodine-131- 8.07 days
Radium-226- 1,600 years

Which of these materials will decay the fastest to one-fourth of its original amount?

a Bismuth-212

b Sodium-24

c Iodine-131

d Radium-226

Question

The table below shows the half-lives of four radioactive materials.


Radioactive material	Half-lives
Bismuth-212-	60.5 seconds
Sodium-24-	15 hours
Iodine-131-	8.07 days
Radium-226-	1,600 years

Which of these materials will decay the fastest to one-fourth of its original amount?

a Bismuth-212

b Sodium-24

c Iodine-131

d Radium-226

anonymous · Answer

Bismuth-212

anonymous · Answer

thnx can you help me with some other ones?

anonymous · Answer

The shortest half-life is the radionuclide that decays the most rapidly.

anonymous · Answer

what ?? lol got me lost now

anonymous · Answer

A half-life is the time it take for half of the material to decay. The shorter the half-life the faster the decay. 

Things that live a day die faster than things that live a year. Same principle.

anonymous · Answer

was he right with the first answer?