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OpenStudy (anonymous):
Scientific research has found many negative effects of common household materials. Which of the following elements was once used in paint but was found to be dangerous? argon (Ar) calcium (Ca) lead (Pb) mercury (Hg)
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OpenStudy (aravindg):
lead
OpenStudy (anonymous):
lead was used as paint originally?? I didn't know that
OpenStudy (aravindg):
i am nt sure srry
OpenStudy (anonymous):
eh, its okay
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