Cars, aeroplanes, factories etc
<span>Radioactive waste, as its name implies, is a source of radiation that can be harmful to living organisms. Therefore it needs to be disposed of very carefully in such a way that the radiation cannot reach human beings and other living organisms. One method to do this is to bury the waste in deep pits. </span>
Out of the options, "Iron" is the most dense here.
In short, Your Answer would be Option D
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Fe
Cobalt
Sodium
Sn
Phosphorus
Florine
I don’t know
Mg
I don’t know
Calcium
C
Pb
Silver
Zinc
Nickel
Increase. The particles of the solute are more evenly distributed between the solvent, thus speeding up the process of dissolution.