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Looking at the Periodic Table of elements, is potassium a metal, metalloid or nonmetal
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The earth formed roughly 4.5 billion years ago, yet evidence of life dates back to about 3.5 billion years ago. which one is not a possible hypothesis of how life on earth arose?
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Energy stored in the bonds that hold together the atoms and molecules of all substances is called a. kinetic energy. b. electrical energy. c. mechanical energy. d. chemical energy.
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Looking at the Periodic Table of elements, is potassium a metal, metalloid or nonmetal...
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