Question

I will give medal!!!

Which of the following has the longest half-life?

Carbon-14
Uranium-235
Uranium-238
Carbon-12

Answer 1

@iambatman

Answer 2

Any idea?

Answer 3

maybe its either c or d

Answer 4

We can get rid of carbon 14 since we know it has the shortest

Answer 5

You're on the right track, keep going

Answer 6

wait i mean b or c because I don't think Carbon-12 is radioactive, so it doesn't have a half-life

Answer 7

Right!

Answer 8

Keep going, you seem to be doing good!

Answer 9

@iambatman

Answer 10

Uranium-238 has a half-life of 4.468 billion years.
Uranium-235 has a half life of 703,800,000 years (703.8 million years)

Answer 11

I'm not exactly sure of the times, but it could be that, so then your answer will be? :P

Answer 12

uranium-238

Answer 13

Good! :)

Answer 14

You can google half life of these elements, so I just did Uranium 238 and got 4.5 billion years
Uranium 238 is 700 million years, so you were right!