18. The description of the structure of the atom is called the
(a point)

what do you mean by description

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.

a polar bond is formed when electrons are shared unevenly between atoms