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A sample of a radioactive isotope initially contains 20 x 1010 After 16 days, 5 x 1010 atoms remain. What is the half–life of the isotope? Group of answer choices
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Which statements describe polyatomic ions? check all that apply. polyatomic ions have many charges. polyatomic ions have one overall charge. polyatomic ions repel other ions to form ionic bonds. polyatomic ions attract other ions to form ionic bonds. polyatomic ions are made up of only one type of atom. polyatomic ions are made up of two or more types of atoms.
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Which form of relativism states that people rely on their own standards of right and wrong when making a decision?
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If a reactant was removed, did the new equilibrium system shift to make more reactants or more products?
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Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?
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A sample of a radioactive isotope initially contains 20 x 1010 After 16 days, 5 x 1010 atoms remain....
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