Answer:Strontium-90 and cesium-137 have half-lives of about 30 years (half the radioactivity will decay in 30 years). Plutonium-239 has a half-life of 24,000 years. High-level wastes are hazardous because they produce fatal radiation doses during short periods of direct exposure.
Explanation:
Answer: Ch4 i think
Explanation: i try my best
hope this helps have a nice day
The number of atoms in 12 grams of the isotope carbon 12.
Answer:
I think its alike.... Pretty sure actually