Chemistry

What is the most common chemical element found in the Earth's atmosphere?

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What contain most of the calcium ion in the human body?
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What element was named after the planet Uranus?
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In which emission is the most mass lost?
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Which of the following could not act as a ligand?
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What is the breakdown of a material by separation of the layers of which it is composed called?
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What sort of change happens to a head of lettuce when you cut it in half?
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What does the "T' represent in t-butyl?
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What is the name of the protein found in wheat flour?
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