atomic number 35,
bromine,
br a nonmetallic heavy volatile corrosive dark brown liquid element belonging to the halogens; found in sea water
atomic number 53,
iodin,
iodine,
i a nonmetallic element belonging to the halogens; used especially in medicine and photography and in dyes; occurs naturally only in combination in small quantities (as in sea water or rocks)
atomic number 19,
potassium,
k a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite
atomic number 11,
na,
sodium 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)
