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(5 points)
During a class experiment you produced a green solid with the molecular formula AB2. Where would elements A and B be located on the periodic table? If you were able to decompose the compound AB2 into its elements A and B, what properties would each of these have? Justify your answer.
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(5 points)
Compare the densities of the gases fluorine, nitrogen and oxygen. Give reasons for your answer.
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(6 points)
(a) Research the meaning of electronegativity.
(b) How does electronegativity trend down groups and across periods?
(c) Compare electronegativity with reactivity, for metals and non-metals.
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