Molecular Range | Meaning – Surface Tension

Molecular Range Meaning:
The maximum distance upto which a molecule can exert a force of attraction on other molecules is called molecular range.

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Molecular Range | Meaning – Surface Tension

The molecular range is different for different substances.

• In solids and liquids, it is of the order of 10^-9m.
• If the distance between the molecules is greater than 10^-9 m, the force of attraction between them is negligible.

Molecular Range in Surface Tension:
Surface tension has been well- explained by the molecular theory of matter. According to this theory, cohesive forces among liquid molecules are responsible for the phenomenon of surface tension. The molecules well inside the liquid are attracted equally in all directions by the other molecules.

Surface Tension:
In Physics, the tension of the surface film of a liquid because of the attraction of the surface particles by the bulk of the liquid, which tries to minimize surface area is called surface tension. When the surface of the liquid is strong enough, then surface tension is applicable. It is strong enough to hold weight.