Among chlorine, oxygen, bromine, and silver, at room temperature, silver is the densest.
The density of a substance measures how closely packed are the molecules. The higher the attraction forces between the molecules, the closer they will be and the more dense the material will be.
Ag atoms are bonded through metallic bonds, which is the strongest bond. So one will expect that Ag is the densest.
On the other hand, chlorine, oxygen and bromine are nonmetals, whose molecules are formed by covalent bonds, and their molecules interact through London forces, which are among the weakest.
We can confirm this looking at the densities of the elements:
Oxygen (1.49 g/L) < Chlorine (3.21 g/L) < Bromine (3100 g/L) < Silver (10490 g/L)
Among chlorine, oxygen, bromine, and silver, at room temperature, silver is the densest.
You can learn more about density here: https://brainly.com/question/24687547
