Chemistry please check
posted by Mary .
1. All of the naturally occurring radioactive decay series end when the radioactive elements have decayed to
answer: Uranium (U)
2. This type of radiation can easily pass through a human.
3. This type of radiation is really the nucleus of a helium atom.
4. As the size of nuclei increases, the ratio of neutrons to protons in the band of stability increases to
3 to 1
1.25 to 1
2 to 1
1.5 to 1
answer: 1.5 to 1
Ok except for #1. U is a radioactive element, naturally. There is a series for U-238, another series for U-235, and a third for Th-232. All end in Pb.
please need help thanks alot!!!!
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