Identify the letter that corresponds to each of the following groups of the periodic table:
a) chalcogens b) noble gases c) alkaline earth metals d) halogens 
Correct Answer:
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Q121: A cation has a _ charge, and
Q122: Nitrogen and oxygen combine to form several
Q123: Give an example of a nonmetal.
Q124: What is the correct name for SO3?
Q125: Give an example of an ionic compound.
Q127: Give an example of a halogen.
Q128: Give an example of a metalloid (a.k.a
Q129: What is the chemical formula for hexasulfur
Q130: What is the chemical formula for calcium
Q131: Give an example of a transition metal.
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