The nonmetals helium, neon, and argon and the meadows copper, silver, and gold are among only a few elements that are found in nature in their pure forms. What can you infer about the chemical reactivity of these elements?
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Expert's answer
2020-12-17T07:36:04-0500
Nonmetal reactivity decreases down a group because the nucleus' ability to gain more valence electrons weakens due to more nuclear shielding.
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