名詞 na:

1. 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)
   同義詞：sodium, atomic number 11

Na
NONE（無詞性）
The symbol for the element sodium
元素sodium的符號

來源：
From New Latin natrium
源自 現(xiàn)代拉丁語 natrium
from French natron [natron] * see natron
源自 法語 natron [泡堿] *參見 natron