Which of the following best describes hydrogen bonds: They are the most common type of intermolecular force
They are present in all molecules even if they are not the primary intermolecular force
They are very weak but help stabilize the molecule
They are a specific, stronger type of dipole-dipole forces

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the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.

the answer is c.the valence of the atoms combine .