[Q]: The Periodic Table of the Elements is arranged so that elements with similar characteristics are in the same column. Which element is a highly reactive metal?
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[A]: magnesium (Mg)

[Q]: Which statement about photosynthesis and respiration is true?
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[A]: Photosynthesis stores energy and respiration releases energy.

[Q]: Which of the following forms of energy is released or absorbed in most chemical reactions?
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[A]:
heat energy