Darmstadtium (formerly Ununnilium)
Darmstadtium (Ds) is one of the elements that doesn't get much fame; in fact, Ds doesn't even show up on many high school chemistry periodic table of elements. Instead, Ununnilium (Uun) is in its place. Ds hasn't even been seen before, but it is thought to be probably somewhat silvery or white in appearance. Additionally, Ds is considered to be a "super-heavy" atom, its atomic number being 110 and its mass around 271 amu.
Hassium (formerly Unniloctium)
Hassium (Hs) is another element that can be closely related to Ds - at least in weight and atomic structure. Its atomic number is 108 and its atomic mass is just short of Ds, at about 269 amu. Like Ds, it has never been seen before, but is thought to be metallic grey in appearance. Like Ds, you probably won't find Hs on many periodic tables, but you will find Unniloctium (Uno).
Bohrium (formerly Unnilseptium)
Bohrium (Bh) is similar in attributes to both Hs and Ds; it is considered to be a "super-heavy" atom as well. With the atomic number 107, it is surprising that it actually weighs more than both Ds and Hs, at around 274 amu. Bh is such a mysterious element that chemists aren't even sure of its physical state. It is presumed to be a solid, but we may never know for sure, because so far Bh has proven to be somewhat useless.
