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In 1818 there were 49 known and accepted (by the scientific community) elements.
What else can I help you with?
How many elements have been observed as of 2008?
117 elements
When Mendeleev developed the first periodic table there were approximately how many elements known?
By 1869, a total of 63 elements had been discovered.
How many elements when mendeleeve made his periodic table?
I believe there were 55 or 56 known elements then.
How many pure elements are there on the earth?
There are 118 known elements, but the number of pure elements found naturally on Earth is around 90.
How many elements are in the periodic tables?
112 elements have been named and additional 6 elements have been tentatively proposed.
Number of elements known in the 1800?
36 elements were known in 1800.
Number of elements know in 1800?
Approx. 20 elements were known in 1800.
How many elements were discovered by the end of 18th century?
Approx. 25 chemical elements were known in 1800.
There are how many currently known elements?
There are currently 118 known elements.
How many elements have been observed as of 2008?
117 elements
When Mendeleev developed the first periodic table there were approximately how many elements known?
By 1869, a total of 63 elements had been discovered.
About how many known elements are there?
118 or 119
How many different chemical elements are there?
Now are known 118 chemical elements.
How many known elements are on earth and are they all naturally known?
112
How many elements are known to exist on earth?
Today are known 118 chemical elements; 98 are considered as natural elements (but some have also and an artificial origin).
What did Mendeleev organize in the 1800?
Periodic Table of Elements.
How many elements do you have now?
Today (July 2013) 118 chemical elements are known.
