Resonance energy.
Resonance energy is the energy that helps in determining the delocalized electrons present in any molecules where a single Lewis structure cannot specifically express the bonding.
angle of contact.
It is defined as the angle between the tangent to the liquid surface at the point of contact and solid surface inside the liquid is called as angle of contact The value of angle of contact depends upon (i) Nature of solid and liquid in contact (ii) Cleanliness of the surface in contact (iii) Medium above the free surface of liquid
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