Density is defined as mass per unit volume. Comparing the densities of various elements helps identify which is the most compact.
The approximate densities of the elements provided are:
| Element | Symbol | Approximate Density ($\text{g/cm}^3$) |
|---|---|---|
| Lead | Pb | 11.34 |
| Platinum | Pt | 21.45 |
| Mercury | Hg | 13.53 |
| Osmium | Os | 22.59 |
By comparing these values:
Thus, Osmium is the element with the maximum density among the given choices.
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