関連ワード:
elements in group 2 are known as elements in group 2 are known as alkaline metals the elements in group 2 are also known as the elements in group 2 of the periodic table are known as elements in group 2 are classified as alkali metals elements in group 2 are classified as why group 2 elements are known as alkaline earth metals elements of group 1 and 2 are known as group 2 elements are called as the elements in group 1 2 and 13 and 18 are known as
