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What would be the mass of a rock falling from the sky if it hits the ground with force of 137n
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How do the energy differences between the higher energy levels of an atom compare with the energy difference between the lower energy level of the atom
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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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What would be the mass of a rock falling from the sky if it hits the ground with force of 137n...
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