Which is used in radioactive dating?
O A. carbon-14
O B. index fossils
O C. hydrochlor...
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Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.
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Drive down any three characteristic of modern periodic table
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Which statement names the physical property of wood a. wood is softer than coal b. wood does not rust c. wood can rot d. wood can burn
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