Many people were involved in the discovery of the elements. Certain elements have been known since ancient times and man will never know who truly discovered those. There is more information at the related link.
lanthanum is a element on the perodic table ...
Francium
Hydrogen is in the periodic table because it is an element, and all elements are in the periodic table.
Down in any group of the perodic table.
The element argon was discovered in 1894.
The element Boron was discovered in Paris.
Most chemists attribute the discovery to Dmtri Mendeleev.
The element niobium was discovered by Charles Hatchett in the year 1801. He discovered the element by analyzing a piece of columbite in a museum's collection.
A Halogen.
He created the first perodic table and organized the element in the periodic table by atomic mass
The elements that are newly discovered or are radioactive and found in traces are usually named according to a system of nomenclature based on their atomic nos.Eg. element 243 (if discovered, some day) will be named as biquadtrium (Bqt) which is NOT the proper symbol/name for the element.
where was the element nickel discovered??