One or more calcium ions (ca+2) combine with one or more chlorine ions (cl-1). what is the resulting formula?

question 8 options:

ca2cl2

cacl2`

ca2cl

cacl

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sup bro, im dumb, but this is what i found xd

"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"