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Depending on the isotope: - for 235U: 7,038.108 years - for 238U: 4,468.109 years etc.
Europium is radioactive, though for most practical purposes it can be treated as stable. 52.2% of europium is stable. 47.8%, is radioactive 151Eu, but the half life of this is long, at 5,000,000,000,000,000,000 years. Like all other elements, europium has radioactive synthetic isotopes.
Uranium
Uranium
See link below for a good article on Chernobyl.
It was in the Ukraine, however it affected many countries across Europe and the world
It happened on 26 April 1986
The disaster at Chernobyl led to the evacuation of people from the area due to dangerous radioactivity readings. Chernobyl is now an abandoned City and the wildlife around the area collect high levels of radioactive particles.
5,730 years
it threw radioactive materials into the atmosphere which was spread by the weather
Depending on the isotope: - for 235U: 7,038.108 years - for 238U: 4,468.109 years etc.
The both ultimately resulted in the release of radioactive material from a nuclear reactor into the environment.
The area where the city of Chernobyl is, is highly radioactive after the nuclear disaster at the nearby power plant in 1986. A few people still live in the city, but the power plant is abandoned as is the nearby city Pripyat.
There was no famous disaster (or anything else) at Chernobyl in Russia as there is no such place. However for the disaster that occurred in Chernobyl in the Ukraine, please see the related question.
Chernobyl has three syllables: cher-no-byl
Because of the disaster at the nuclear power plant in Chernobyl, not many people live there. Chernobyl, Ukraine has a population of 500.
Yes it can. If a nuclear power plant melts down radioactive material is put into the atmosphere, land, water. A good example of this is in Russia where Chernobyl had a meltdown. Nothing can live there today and won't for another 100 years.