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Proposed chemical element
Sequanium was the proposed name for a new element that Romanian physicist Horia Hulubei reported he had discovered in 1939. The name derived from the
Sequanium
(2005-09-10). "The Twilight of the Naturally-Occurring Elements: Moldavium (Ml), Sequanium (Sq) and Dor (Do)". International Conference on the History of Chemistry
List of misidentified chemical elements
List_of_misidentified_chemical_elements
Chemical element with atomic number 87 (Fr)
2005). "The Twilight of the Naturally-Occurring Elements: Moldavium (Ml), Sequanium (Sq) and Dor (Do)". International Conference on the History of Chemistry
Francium
Abbreviations used in chemistry
Samarium 62 Current symbol is Sm. So Sodium 11 Current symbol is Na. Sq Sequanium 93 Discredited claim to discovery of neptunium made by Horia Hulubei and
Chemical_symbol
Group of highly reactive chemical elements
2005). "The Twilight of the Naturally-Occurring Elements: Moldavium (Ml), Sequanium (Sq) and Dor (Do)". International Conference on the History of Chemistry
Alkali_metal
Chemical element with atomic number 93 (Np)
the new element via spectroscopy in minerals. They named their element sequanium, but the claim was discounted because the prevailing theory at the time
Neptunium
Romanian nuclear physicist
the discovery of a new element, "moldavium", in 1936, the discovery of "sequanium" in 1939, and that of "dor" in 1945. Later, however, it was shown that
Horia_Hulubei
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