Answer: krypton

AnswerCrossword Clue
KRYPTONIts atomic number is 36
KRYPTONDoomed fictional planet
KRYPTONSuperman's home
KRYPTONPlanet from which Kal-El was jettisoned
KRYPTONJor-El's planet
KRYPTONDoomed planet of comics
KRYPTONSuperman's birthplace
KRYPTONKal-El's birthplace
KRYPTONGas in fluorescent lamps
KRYPTONWorld of DC Comics
KRYPTONNeon cousin
KRYPTONDC area?
kryptona gaseous element
kryptoninert gas