Density = MASS/Volume.
Density = mass/volume for solid, liquid, or gas. It doesn't matter.
Density = Mass/Volume
You measure its mass and volume and then density = mass/volume.
Density = mass/volume for solid, liquid, or gas. It doesn't matter.
To find the density of any object you divide the volume from the mass. The units used for a solid are kg/m^3 or g/cm^3.
what is the solid element with the greatest density
That depends on the liquid and the solid. Coal is a solid with a very low density. Mercury is a liquid with a very high density.
The density of any material thing is (its mass) divided by (its volume), regardless of its shape.
on a balance
the wigth and length
If the solid is not completely submerged in water the reported density of the solid will be less. Density is basically mass over volume.