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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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In saturated organic compounds, all the bonds between carbon atoms are called?
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How many moles of cu are needed to react with 5.8 moles of agno3? cu + 2 agno3 β cu(no3)2 + 2 ag
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Two liquids are poured into a beaker. after a few seconds, the beaker becomes warm. which of the following best describes this reaction? a. an exothermic reaction b. a decomposition reaction c. an endothermic reaction d. a single-displacement reaction
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