1.. The soil is still radioactively contaminated after the Chernobyl nuclear explosion. so NO, Most of the people who left Chernobyl after the nuclear plant explosion have not returned.
2. NO,The accident at Chernobyl had not occurred during a safety test.
3. YES, Temperatures inside the reactor during the explosion were as hot as parts of the Sun's atmosphere.
4. YES,The fuel in the reactor included U-238 from enriched uranium dioxide.
5. YES, A radioactive cloud blew across Northern Europe after the explosion.
6. NO,Isotopes of the same element have not the same number of neutrons. but Isotopes are atoms of the same element that have the same number of protons and electrons but different numbers of neutrons
7.YES, When one mole of U-235 undergoes fission, the energy released can power about 400 average U.S. homes for a year.
8.YES, Nuclear reactors must have control rods to keep a chain reaction from occurring.
9.YES, Radioactive strontium can lead to bone cancer.
10.YES, The radioactive iodine released during the explosion still poses a health threat to people in Northern Europe.
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