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Radon — This article is about the chemical element. For other uses, see Radon (disambiguation). astatine ← radon → francium Xe ↑ Rn ↓ Uuo … Wikipedia
Poland — Polska redirects here. For other uses, see Polska (disambiguation). This article is about the country. For other uses, see Poland (disambiguation). Republic of Poland Rzeczpospolita Polska … Wikipedia
Niue — Niuē … Wikipedia
Rubidium — krypton ← rubidium → strontium K ↑ Rb ↓ … Wikipedia
Zinc — This article is about the metallic element. For other uses, see Zinc (disambiguation). copper ← zinc → gallium ↑ Zn ↓ Cd … Wikipedia
chemistry — /kem euh stree/, n., pl. chemistries. 1. the science that deals with the composition and properties of substances and various elementary forms of matter. Cf. element (def. 2). 2. chemical properties, reactions, phenomena, etc.: the chemistry of… … Universalium

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