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Technetium (chemical symbol Tc, atomic number 43) is a silvery gray, radioactive, crystalline metal. Its appearance is similar to platinum, but it is commonly obtained as a gray powder. Its short-lived isotope ^99mTc is used in nuclear medicine for a wide variety of diagnostic tests. ⁹⁹Tc is used as a gamma ray-free source of beta particles, and its pertechnetate ion (TcO₄^-) could find use as an anodic corrosion inhibitor for steel.

Bean is a common name for edible plant seeds or seed pods of several members of the Legume family (Fabaceae, formerly Leguminosae) or the various leguminous trees and shrubs that produce these seeds or pods. The various species of bean plants include some of the very first plants cultivated by people in both the Old and the New Worlds, providing protein, vitamins, and other nutrients.