Degeneracy may be defined as the total number of energetically equivalent electronic energy states. Not considering the electronic spin, the degeneracy of the
second excited state( n = 3) of Hatom is 9.
True
False​

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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