Untribium
Untribium, also known as element 13 or eka-Rutherfordium, is the possible chemical element in the periodic table with the placeholder symbol of Utb and atomic number 132. Untribium and UTB are the temporary systematic IUPAC name and symbol, which are used until the element is discovered, confirmed, and a permanent name is decided upon. In the periodic table of the elements,it is expected to fall within the range of the island of stability.