TheCaretakerium

TheCaretakerium is a hypothetical element with the atomic number -55 and the symbol TCr.

Appearance
TheCaretakerium is a gray solid at room temperature. It is one of the densest Negative Elements. It can be found rarely on the moon. It is extremely rarely found on Earth in meteors.

Isotopes
TheCaretakerium has no stable isotopes. It's most stable isotope is $-220$TCr, which has a half life of 558200 Years. The rest of the isotopes has a half life no longer than 145921 Years.

Uses
TheCaretakerium can be used for stuff that require strong durability