The D1 and D2 Fraunhofer spectral lines form this element's namesake "doublet." This metal can be produced via the Castner process or a Downs cell, and its azide is used in the airbags of cars. This element glows bright (*) yellow in the flame test, 
The D1 and D2 Fraunhofer spectral lines form this element's namesake "doublet." This metal can be produced via the Castner process or a Downs cell, and its azide is used in the airbags of cars. This element glows bright (*) yellow in the flame test, and baking soda is this element's bicarbonate. For 10 points, name this element which makes up table salt with chloride, has atomic number 11, and has atomic symbol Na.
The D1 and D2 Fraunhofer spectral lines form this element's namesake "doublet.
sodium (accept Na before mention)