Chemistry

What is the second most abundant element by mass (about 18.5%) in the human body?

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What state of matter takes a shape of its own?
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What energy is stored in the form of chemical compounds?
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What is the symbol used on the periodic table for the element Terbium?
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Which of the following best describes what water is?
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Silver chloride and silver nitrate are both chemicals that darken with exposure to what?
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