There are presently 118 elements listed. Is there a limit on how many there can be?

I would imagine it is possible to find elements in space that are not even found on our world.

Answer:
Well there is a limit in the sense that there will likely not be any more naturally found elements, but that is not to say that scientists cannot find a way to manufacture more elements like they have done in the past like at an institution like UC Berkeley. But it seems to be getting harder and harder to manufacture an element with more protons than have already been made.
there can't be a limit, we come up with more synthetic ones all the time, where do they go? but i don't know about natural, but your probably right about space
It is theoretically possible to use particle accelerators to make elements beyond number 118. Most of them are so unstable that they only exist for tiny fractions of a second. There is, however, an island of stability thought to have enough neutrons to stabilize the elements: http://en.wikipedia.org/wiki/island_of_s...

I would suppose that you can synthesize many elements beyond 118 but as the number of protons increase the half life of the element will approach zero. Thus, you will eventually reach a point where the element can not exist for any length of time.
Jennifer,

If you are talking about elements that can be found somewhere in nature, then yes, there is a limit and we have already found it. Anything above element 92 (uranium) does not occur in nature, and in addition there are two elements with atomic numbers lower than 92 that are not found in nature either. That means there are exactly 90 elements that occur in nature, and no more can ever be found, not even in space. The reason is that elements are produced by nuclear fusion inside stars, but there is a limit to how large of a nucleus even the temperatures and pressures of a star can produce.

However, as other asnwerers pointed out, there is no theoretical limit to how many elements can be synthesized at particle acceleration labs here on earth. Scientists are still continuing efforts to produce new elements to this day. But it does become harder and harder to produce new ones as the mass of the nuclei get larger. Hope this answers your question.
No, there is no limit. The periodic table list elements in order of how many protons are in an element's nucleus, so it is possible to make a bigger list. (Will a bigger list be more useful?)
Scientist all over the world at this point try desperately to create elements over 118. The problem with this, however, is that it gets extrememly difficult as the mass of the nucleus gets bigger. Another problem is that the elements beyond 96 (I believe) are all man made and not found in nature. These have incredibly short half lives... the bigger you go.. the shorter the element lives. It is theoretically possible to do this, but extremely difficult.
no, it is possible to have more elements than we currently know there to be, but the ones we have no discovered and almost certainly going to have to be manufactured, not found on other planets. these elements are incredibly heavy, and therefore incredibly unstable, so their nuclei have a tendency to fall apart as soon as they're created.

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