If 2 different atoms are bonded together with a nonpolar bond , what can we say about the electronagativities of the 2 atoms

Their electrons must be the same. Afterall, if the bond is covalent, the electron must be shared equally. This can only happen is the atoms tug on the electrons with the same strength. Since the strength is determined by electronegativity, then the electronegativities must be the same.

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explanation:

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .