Data Table 4: 25.0 mL volumetric flask Volume of water at room temperature (V1 in ml)
Volume of gas in volumetric flask at boil (V2 in mL)
Temperature of gas at boil inside tube (°C)
Volume of gas in volumetric flask at room temperature (V3 in mL)
Temperature of gas at room temperature (°C)
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water is used to store them because it would keep the radiation from getting out in the open and causing harm to the workers

i think the answer is terrae but not 100 percent sure. ▓▬▬ §

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.