The letter J and also Q space not found on the regular table.

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The letter “J” and also “Q” are the only two letter not found on the periodic table. This letters do not take place in either facet symbols or facet names. However, you might find both letter on the routine table in the past and may discover them tho on specific charts.

The Letter J on the routine Table

The letter J was the element symbol for iodine in Mendeleev’s 1871 periodic table.

You won’t find the letter “J” ~ above the IUPAC periodic table that the elements. However, J to be the symbol because that the element jod or iodine ~ above Mendeleev’s periodic table. In some countries (e.g., Norway, Poland, Sweden, Serbia, Croatia), the element iodine is well-known by the name jod, also though the international facet symbol is I. The German word for iodine is Iod or Jod (nouns are constantly capitalized in German). The Jod-Basedow effect gets its surname from the aspect Jod and also the surname of the physician who an initial described the syndrome. The Jod-Basedow impact is hypothyroidism resulting from management of iodide or iodine.

Many people thought the discovery of element 113 through the Japanese RIKEN team would bring about an facet name start with the letter J. But, the researcher went through the surname nihonium with symbol Nh, honoring the Japanese surname for your country, Nihon koku.

The Letter Q top top the routine Table

The letter “Q” walk not take place in any type of official element name. However, it was the momentary or placeholder surname for element 114. After its official discovery, element 114 was named flerovium. The placeholder name was ununquadrium, which means “one one four.” The extended periodic table, which consists of undiscovered elements, still has the letter Q. The placeholder surname for aspect 124 is unbiquadium, with facet symbol Ubq.

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IUPAC rules for short-lived Names

IUPAC temporary names explain undiscovered elements by your atomic number. The only method an element will gain a “J” in its name is if a discoverer chooses the letter, yet the letter “Q” occurs in any type of temporary name containing the number four:

IUPAC short-term name rules


Mendeleev, Dmitrii. (1871). Zhurnal Russkoe Fiziko-Khimicheskoe Obshchestvo 3, 25; German version: “Die periodische Gesetzmässigkeit der chemischen Elemente.” Annalen der Chemie und Pharmacie. Supplement 8, 133-229.Mendeleev, Dmitrii (1889). “The Periodic legislation of the chemistry Elements.” Journal of the chemical Society (London) 55, 634-656.


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