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platinum has a mass number of 195 and contain 74 electron. how many proton and neutrons does it contain?
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Awoman's basketball has a circumference between 28.5 and 29.0 inches and a maximum weight of 20 ounces (two significant figures). what are these specifications in units of centimeters and grams?
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platinum has a mass number of 195 and contain 74 electron. how many proton and neutrons does it cont...
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