41: Niobium, Nb, Used in earrings and tongue studs because it can be colored by oxidation, 42: Molybdenum, Mo, Its pure form is used in specialized high-temp applications because it maintains its strength better than its common alloy, 43: Technetium, Tc, Short-lived isotopes are used in gamma ray imaging of the skeleton since it attaches itself to areas of active bone growth, 44: Ruthenium, Ru, Used in jewlery plating when a dark, pewter-colored shine is desired, 45: Rhodium, Rh, Very expensive but often used to plate cheap jewlery because a small amount makes an opaque, super-shiny coating, 46: palladium, Pd, far more expensive than silver but often used to imitate silver in outdoor applications because it does not tarnish, 47: Silver, Ag, Has been used in coins since antiquity, 48: Cadmium, Cd, an oxide of this metal was one of Monet's favorite pigments,

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