terbium (Tb) /tur′bē·əm/ [Yterby, Sweden] , a rare earth metallic element. Its atomic number is 65; its atomic mass is 158.294.
terbium (Tb) /tur′bē·əm/ [Yterby, Sweden] , a rare earth metallic element. Its atomic number is 65; its atomic mass is 158.294.