1 文書を見つけるための辞書。

• atomic number 11, na, sodium
• Ｎａ, ナトリウム, Na, ソジウム
• a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt)
• アルカリ金属グループの銀の柔らかいすべすべの金属元素