(Science) Periodic Chart Of The Atoms
There's no Einsteinium or Nobelium, matter of fact there's over a dozen elements that hadn't been discovered and named yet. First devised by Mendeleev in 1869, he predicted the existence of other elements and left spaces for those future discoveries. This chart extends up to 98, which is the element of Californium, found in 1950. Today's chart extends up to 118 elements identified.
Condition is very good, and comes with informational booklet.. Size is approximately 9.75 x 13.5 (inches)