1. Which of the following pairs of elements have similar properties and why? Li and Be, because they both hare electrons in the 2s energy level and sublevel.
b. F and Ci, because they have the same amount of valence electrons.
c. Na and C1, because Na wants lose one electron while Cl wants to gain 1 electron
d. H and He, because they are both gases and located in the s block.
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Asample of gas occupies 17 ml at –112°c. what volume does the sample occupy at 70°c a. 10.6 ml b. 27 ml c. 36 ml d. 8.0 ml you

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How do cfcs cause ozone depletion? how do cfcs cause ozone depletion? ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule.