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5. The volcanic eruption of Mt. St. Helens in the state of Washington in 1980

produced a considerable quantity of a radioactive element in a gaseous
state. Atoms in the radioactive substance had 86 protons. Which was it?

Rubidium
Bromine
Polonium
Radon

User Todd Welch
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1 Answer

2 votes

Answer:Polonium

Step-by-step explanation:

User Deidre
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