keemiline element, leelismuldmetall, pehme hõbevalge läikiv metall, sulamistemperatuur 777 ºC, tihedus 2,64 Mg/m3, a soft yellowish metallic element belonging to group 2 (formerly IIA) of the periodic table; a.n. 38; r.a.m. 87.62; r.d. 2.6; m.p. 769°C; b.p. 1384°C.