Answer:Strontium-90 and cesium-137 have half-lives of about 30 years (half the radioactivity will decay in 30 years). Plutonium-239 has a half-life of 24,000 years. High-level wastes are hazardous because they produce fatal radiation doses during short periods of direct exposure.
Explanation:
Answer:
Place the reactants in a smaller container.
Explanation:
If you were to reduce the source of heat, the hydrogen and oxygen molecules would lose their kinetic energy, resulting in less collisions.
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Maintaining the same temperature of the reactants, the speed would neither increase nor decrease as temperature is directly proportional to the kinetic energy of the molecules, which in turn is directly proportional to the number of collisions. However, placing the reactants in a smaller container would result in less volume, and hence the molecules would collide with one another more often!
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Answer:
B
Explanation:
Because element is made up of only one type of atoms and figure b show only one type of atoms.
Explanation:
Chemical compound, any substance composed of identical molecules consisting of atoms of two or more chemical elements. methane moleculeMethane, in which four hydrogen atoms are bound to a single carbon atom, is an example of a basic chemical compound.....
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