Pure uranium is radioactive. It will react with most nonmetallic elements to make compounds. When it comes into contact with air, a thin, black layer of uranium oxide will form on its surface. Uranium-235 is the only naturally occurring isotope that is fissile.
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Answer:
<h3>A-5N B-6N C-7N D-8N</h3>
Explanation:
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Appropriate symbol for an isotope of potassium - 39 corresponding to the isotope notion r A ZX
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