potassium

noun

a light soft silver-white metallic element of the alkali metal group
アルカリ金属グループの軽い軟質の銀白金属元素

oxidizes rapidly in air and reacts violently with water
空気で急速に酸化し、水と激しく反応する

is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite
自然界では海水およびカーナライト、カイナイト、シルビナイトの中に化合物の形で大量に存在

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