In covalent compounds the bonding (valence) electrons are ___

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.

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock