117(now who knows how many in 3000)
{112}
There are currently 118 known elements.
There are so many elements that have been discovered. In the world, there are currently 118 different known elements known to scientists.
In 1818 there were 49 known and accepted (by the scientific community) elements.
By 1869, a total of 63 elements had been discovered.
118 or 119
Now are known 118 chemical elements.
112
Today are known 118 chemical elements; 98 are considered as natural elements (but some have also and an artificial origin).
Today (July 2013) 118 chemical elements are known.
There were about 63 known elements.
This question is a little ambiguous. If you mean 'how many elements have mass,' the answer is 'all elements have mass.' There are 117 known elements, and scientists theorize that there may be as many as 130 or more.
92 elements occur naturally on the earth.