鹼土金屬 [ㄐㄧㄢˇ ㄊㄨˇ ㄐㄧㄣ ㄕㄨˇ; jian3 tu3 jin1 shu3] alkaline earth (i.e. beryllium Be 鈹, magnesium Mg 鎂, calcium Ca 鈣, strontium Sr 鍶, barium Ba 鋇 and radium Ra 鐳) ◄ ►