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Yttrium-90 is an important radioactive

The isotope of an atom containing 31 protons and 39 neutrons suddenly has two neutrons added to it.What isotope is created?
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2. asked by nunya
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Yttrium-90 is an important radioactive isotope used by doctors for cancer treatment. The isotope undergoes beta decay with a
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2. asked by Kenzie
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Use the periodic table to answer the question. Which element has the same number of electron shells as tungsten (W)? (1 point)
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Which element has the same number of electron shells as tungsten (W)?(1 point) Responses gold (Au) gold (Au) nickel (Ni) nickel
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Which element has the same number of electron shells as tungsten (W)?(1 point) Responses yttrium (Y) yttrium (Y) gold (Au) gold
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Radioactive decay is first order in the decaying isotope. For example, strontium-90 contained in fallout from nuclear explosions
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2. asked by Soco
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Use the periodic table to answer the question. Which element has the same number of electron shells as tungsten (W)? (1 point)
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Use the periodic table to answer the question.An illustration shows the periodic table. Which element has the same number of
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2. asked by i love miners
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Which of the following statements about radioactive dating is true?a. Radioactive decay is the rate at which new atoms form. b.
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2. asked by Anonymous
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How many half lives will it take for a sample of a radioactive isotope containing 20000 radioactive nuclei to decay to 2000
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2. asked by Dianne
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