10. Which element is heavier than carbon (C) but lighter than
oxygen (O)?
A. boron (B)
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An observation that requires measurement is called quantitative observable or qualitative
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Phosphorous can form an ion called phosphide, which has the formula p3−. this ion can form an ion called phosphide, which has the formula p3−. this ion properties very similar to those of pforms when a phosphorus atom loses three protonsis called a cationcontains 18 electrons
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