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The nonbonding or van der Waals radius is half of the_______ internuclear distance when two_______ atoms collide. So, radii calculated from the van der Waals equation are nonbonding radii. According to the kinetic-molecular theory, ideal-gas particles undergo perfectly _______ collisions, in keeping with the definition of nonbonding radii.

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Answer:

Half

Non-covalently bonded

Elastic collisions

Explanation:

When two atoms are close to each other and are not bonded to each other, the distance between them is the Van Der Waals radius of the compound.

When atoms of gases are not bonded together, they collide with each other in an elastic manner. Kinetic energy and linear momentum are conserved.