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What is the symbol of the element that has a mass number of 140 with 82 neutrons?
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Write the complete balanced equation for the reaction between lead (iv) oxide (pbo2) and water (h2o).
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When a beta particle is emitted, the mass number of the nucleus a. decreases by one b. increases by one c. remains the same d. decreases by two
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Ariver current has a velocity of 5km/h relative to the shore, and a boat moves in the same direction as the current at 5 km/h relative to the river. how can the velocity of the boat relative to the shore be calculated?
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What is the symbol of the element that has a mass number of 140 with 82 neutrons?...
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