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Supertopics:
Elements
Materials

Metallic Elements (Metals and Metalloids)

Subtopics:
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webLydia SmithNewsweek2020-04-08
webAshley StumvollPacific Standard2019-06-20
webMark OlaldeCenter for Public Integrity2019-03-18
webSiddharth KaraThe Guardian2018-10-12