The in a chemical formula tells you how many atoms you have of a particular element. chemical symbols
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subscript
coefficient

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements

how important do you think an instrument is to the musician who plays it?

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"