Krypton
Lead.
green Cristal
The real actual element is krypton, it is a noble gas (#36 on the periodic table of elements). In Superman stories the planet is called Krypton, and the green crystals of doom are called Kryptonite.
krypton , KR atomic number 36
Krypton was the element named after Superman's home planet.
Kryptonite robs Superman of his strength.
Krypton
Magnesium
Superman did the atomic number of Krypton(Kr) which is 36
Kryptonite
Lead.
Oxygen
There is an element called Krypton, it has nothing to do with superheros from another planet.
Krypton
Kr for Krypton .
Kryptonite is a fictional element from the Superman comics that generally has detrimental effects on Superman and other beings from the planet Krypton.See link below for article about Kryptonite in all its forms.