atomic number 11

Từ điển WordNet v3.1 - WordNet Dictionary

noun

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)
• Syn:
sodium, Na
• Hypernyms:
metallic element, metal
• Substance Holonyms:
seawater, saltwater, brine, halite, rock salt