
Timothy H. answered 05/31/23
Skilled, devoted, patented and published Teacher
Osmium is the most dense, of your four selected elements, at or near room temperature.
22.61 g/cm^3.
It's often convenient and enlightening to type into your search engine:
Image periodic table of (the property you're interested in.)
For example:
https://sciencenotes.org/density-periodic-table/