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The nuclear fission process releases neutrons and question 27 options: alpha particles electrons energy beta particles
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Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.
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Chemistry, 22.06.2019 14:30
Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o
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Tổng số hạt của một nguyên tử là 58. Số hạt mang điện nhiều hơn số hạt không mang điện là 18
hạt....
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