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What element has 81 protons in the nuclei of its atoms
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Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi, r^3 , where r is the sphere’s radius.
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What do your cells need to live? a. carbon dioxide b. carbon c. air d. oxygen
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What element has 81 protons in the nuclei of its atoms...
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