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there are no examples but 1 example is H2O which has 2 elements combining a compound.
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A reduction potential measures the tendency of a molecule to be reduced by taking up new electrons. ... Standard reduction potentials can be useful in determining the directionality of a reaction. The reduction potential of a given species can be considered to be the negative of the oxidation potential.
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Chromosphere
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You see the middle layer of the sun’s atmosphere, the Chromosphere, at the start and end of a total eclipse.
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for what school? It's different for all sadly :(
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