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Many elements have naturally occurring isotopes, varieties of the element that have different numbers of neutrons in the nucleus.
What else can I help you with?
How has the amount of earths radioactive isotopes changed over time and why has it changed?
They have been slowly declining over time because they decay, eventually becoming stable isotopes of other elements.
What is the change in the earths temperature?
radioactive decay
What are advantages of radioactive decay?
One reason is that radioactive decay heats the earths interior
Could the amount of some elements in earths crust increase?
Yes. That is what causes some of the Earths core heat. Elements being formed by radioactive decay. Look at the Earths' makeup and see that the percentages of elements follows the periodic chart by decay.
Could the amount of elements in Earth's crust increase?
Yes. That is what causes some of the Earths core heat. Elements being formed by radioactive decay. Look at the Earths' makeup and see that the percentages of elements follows the periodic chart by decay.
Is it hot in the earths mantle?
Decay of radioactive elements in the mantle heats it.
Earths atmosphere was first changed by?
photosynthesis
How does radioactive waste affect the earths physical and chemical cycle?
Any influence was detected.
What is the radioactivity for lead?
The main lead isotopes 206Pb, 207Pb and 208Pb, are not radioactive. It does have traces of radioactive isotopes, but the quantity is so small that lead's radioactivity can be considered zero. It is however toxic if ingested.
How has earths surface changed since the beginning of earths time?
The continents have moved, Volcanoes and mountains have made hige changes in the earths suface too.
What sort of energy is stored uranium?
It is chemical energy because it has been pushed up from the earths radioactive core.
What is the answer to Earths surface can be changed by natural forces such as?
Umm, I think the crust.
