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Madame Curie discovered two elements: polonium and radium.
Any element was discovered in 1985.
There are 26 transuranic elements that have been discovered so far. These elements have atomic numbers greater than uranium (92) and are all synthetic, meaning they do not occur naturally on Earth.
Over 11 chemical elements have been discovered at Stanford University, including nobelium, lawrencium, and seaborgium.
Many of the first discovered elements were named by their discoverer or the location where they were discovered, such as hydrogen, named by Antoine Lavoisier, and uranium, named after the planet Uranus.
No one knows how many elements are left to discover.
There were 118 discovered elements in the periodic tableÊas of 2008. However, some of these elements still have ongoing disputes.
Approx. 25 chemical elements were known in 1800.
In 1870, 63 elements had been discovered.
118 (all elements from #1 to #118).
63 elements had been discovered so far.
90
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If they are not discovered yet how would we know how many? Also, your question is phrased poorly.
Madame Curie discovered two elements: polonium and radium.