A search in google clearly shows that the word tantalum is the correct spelling of the word and is widely used today. What made me curious was this Wikipedia entry wrote:
Previously known as tantalium...
So, I searched when this word come into usage. A search to google Ngrams shows this:
This clearly shows that a spike in the usage of the word tantalium in around 1802 which is about when 'tantalum' was discovered. Then slowly into the future closer to modern times, tantalium is now classified as obsolete.
I have a few questions relating to this:
1) Why is tantalium obsolete and made tantalum surpass it?
2) There is a spike in usage of the word tantalium just after the discovery of this metal. Could the word originally be named tantalium?
3) There was a small amount of usage of the word tantalum in 1747 and 1754, well before the discovery of such metal. What could be the cause of this?