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Approximately 80% of the Earth's natural radioactivity comes from the decay of uranium, thorium, and potassium-40 in the Earth's crust.

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1y ago

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Which alkaline earth metals are radioactive?

Radium is the radioactive metal among alkaline earth metals.


What alkaline earth metal is radioactive?

There are two radioactive alkaline earth metals: radium (Ra) and radium (Ra). Both elements have radioactive isotopes that undergo radioactive decay.


What is the source of heat in the Earth interior?

The decay of radioactive isotopes.The decay of radioactive isotopes.The decay of radioactive isotopes.The decay of radioactive isotopes.


What can be naturally radioactive?

The core of the earth is radioactive, as is the sun. Granites, which crystallize from mantle material are commonly slightly radioactive.


What effect does americium have on earth?

Americium can be a radioactive contaminant of the earth.


What is the heaviest non-radioactive alkali Earth metal?

Barium is the heaviest non-radioactive alkali Earth metal, with an atomic number of 56.


How do radioactive wastes affect the Earth?

it can kill the earth and even us if there is to much


How many half-lives have passed for 50 percent of the original radioactive material?

One half-life has passed for 50 percent of the original radioactive material to decay.


The time it takes for 50 percent of the nuclei in a radioactive sample to decay to its stable isotope is called?

The time it takes for 50 percent of the nuclei in a radioactive sample to decay to its stable isotope is called the half-life of the radioactive element. It is a characteristic property of each radioactive isotope and can vary greatly among different elements.


What causes heat in center of earth?

Radioactive Decay


Where does heat originate from the earth?

Underground - from radioactive decay.


Which alkaline earth metal is radioactive?

Radium. Elements with an atomic number greater than 83 are always radioactive.