silver tarnishes quickly
11Thallium — (pronEng|ˈθæliəm) is a chemical element with the symbol Tl and atomic number 81. [ [http://periodic.lanl.gov/elements/81.html thallium ] , Los Alamos National Laboratory. Retrieved November 21, 2006.] This soft gray malleable poor metal resembles …
12Ytterbium — Yb redirects here. For the unit of information, see Yottabit. thulium ← ytterbium → lutetium ↑ Yb ↓ No …
13Reactivity series — Not to be confused with Electrochemical series. In introductory chemistry, the reactivity series or activity series is an empirical series of metals, in order of reactivity from highest to lowest.[1][2][3] It is used to summarize information… …
14Native copper — Copper Native copper from Ray mine, Arizona (specimen 5.25 x 4 x 1 cm) General Category Native metal C …
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