At "ordinary" pressures (that is, pressures not greatly exceeding those commonly found on Earth's surface), the densest solid elements (osmium and iridium) are a bit less than 23 tons per cubic meter and the least dense (lithium) is a bit over half a ton per cubic meter, so those are reasonable limits for fully solid matter (i.e. crystalline with no voids). By including voids or air inclusions (such as in styrofoam or aerogels) you can…
Solids tend to be heavier because they have more atoms in less area (density) and the reason they have more atoms in less area is because they have an atomic attraction between them that is much greater than that of gasses and liquids (liquids have no atomic attraction and gasses tend to repel themselves)
In the liquid state, particles move freely,the particles are not closely packed they can slip and slide on each other and have greater space between them as, compared to solids. OR The intermolecular space is more in liquids than in solids and so, it can difusse faster.That is why rate of difussion in liquids is higher than that of solids.
How does these three terms density rigidity and fluidity apply to particles in the solid gas and liquid phase?
Solids and liquids are denser than gases. That is has more tightly packed molecules. Solids are more rigid than liquids and gases. That is they retain their shape when force is applied(with exceptions) When too much force is applied they break rather than changing shape Liquids and gases are more fluid than solids.
Sound travels slower through gases than through liquids and solids because the molecules in gases are?
the speed of sound depends on the material through which it's passing. it is greater in solids than in liquids or gases because the molecules in a solid are closer togather than in a liquid or gas. Material Speed m/s Air(0°C) 330 Water 1400 Concrete 5000 Steel 6000 "compression-type" sound will travel faster in solids than in liquids, and faster in liquids than in gases, because the solids are more difficult to compress than liquids…