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An atom of element Z has the electronic configuration 2.8.6. Which one of the following statements about element Z is correct?
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Seawater contains approximately 3.5%nacl by mass and has a density of 1.02 g/ml. what volume of seawater contains 7.5 g of sodium?
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Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.
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The nuclear fission process releases neutrons and question 27 options: alpha particles electrons energy beta particles
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In 2002, the rare earth elements mine in mountain pass, california was closed because
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An atom of element Z has the electronic configuration 2.8.6. Which one of the following statements a...
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