Using a stolen bracelet made of Shazamium (Element no. 98), Dr. Sivana adopted ethereal form, as part of an elaborate plan to eliminate both Shazam and Captain Marvel. In order to capture Sivana, Captain Marvel temporarily commandeered an atomic laboratory, and using modern scientific equipment, he single-handedly developed a 99th element for the Periodic Table, Marvelium, the world's mightiest metal. It is the heaviest and strongest of all elements in the Earth-S Universe, and can be used to bind even immaterial ghosts. From this material he created a room-sized box, in which he trapped Sivana.
- Marvelium is so strong that no force in the universe, short of Captain Marvel's own strength, can work the metal into new forms. Captain Marvel believed that even his magic lightning would be unable to penetrate it, thus he had to leave the door into his Marvelium trap open momentarily, in order to spring his trap on Sivana.
- In 1949, in the Earth-S universe, there were 96 elements in the Periodic table. In Captain Marvel Adventures #100, three new elements were added to the table, for a total of 99.
- In 2017, in our own universe, there are 118 elements.
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