Acrystalline solid has a high melting point and is known to be held together with covalent bonds. this solid is an example of

a. a network covalent solid
b. an ionic solid
c. a metallic solid
d. a molecular solid

elements

explanation:

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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.

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