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The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.
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Liquid nitrogen is kept at a temperature of -320 degrees. when liquid nitrogen is heated it quickly boils and turns into gas. which pair of pictures represent the change caused by adding heat to liquid nitrogen?
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Calcium and bromine have formed a bond. leading up to this, calcium gave up electrons. it was a(n)...
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