Artificial transmulation of elements is possible if atomic number of the element is greater than 20.?
452881
False, because the binding energy increases steeply till iron and again reduces. So I would require enormous accelerators to transmute the element with Z>20.
829932
Take radium and subtract two from its atomic number. Then find the element with that result as its atomic number. I'm too lazy to see what that is right now.
985750
All elements with atomic number higher than 92 (Uranium) are artificially produced. To do so, they accelerate a neutron (which is hard since neutron has no charge) and then bombard a lighter nucleus with them. The nucleus absorbs a neutron, releases an electron (beta ray) and keeps a proton, so the atomic number will raise one number. (n -> e + p)\nThey do it again and again until they reach the element that they want. but the higher the atomic number, the lower the half life will be (they will last from few months to few micro seconds) when they say that an element is not yet produced but they put it in the periodic table, this means they have evidence that is should exist, but since the half life is short they are unable to detect it, so they have to wait for technology to advance so they can detect it.
1044077
Actually, we can.\nIf you put lead into an "atom smasher" you can synthesize gold.\nThe problem is that the process costs more than the price of gold.
730598
no,...\nit depends upon the given label or element that accompanies the numeral. the example you gave equals to four. 2 cars plus 2 trucks make 4 vehicles. unfortunately this does not happen all the time. okay what do i mean,,, in chemistry, there is a certain concept wherein the addition of an element to another may cause deduction and not addition. example 2 negative ions added to 2 positive ions result to 0. \n\nfor every rule, there exists a contradicting exemption....
229659
Yes you can.  Some, like radioactive elements, are controlled by law or very difficult to get, but you can buy almost anything if you look around enough.\n\nThis guy has put together an excellent collection of elements:\n\nhttp://www.theodoregray.com/PeriodicTable/\n\nSome he purchased, some were gifts from people who heard he was trying to collect them all, some he isolated from common chemicals himself, and so on.  It's a very interesting collection.
51744
Suprisingly, yes! And, even more suprisingly is, they've already done it! They have teleported the properties, the atom, across a several meter space. This is a step towards teleportation, but really, it's not a very big step because even though we might be able to teleport atoms, we can't arrange them, so it isn't feasible to teleport a human unless they don't mind becoming random atomic sludge on the ground.
619367
Actually, you can turn one element into another by nuclear transmutation. Radioactive elements spontaneously decay over a long period of time and transform into other more stable elements.\n\nSo, doesn't that make Nuclear Physicists Alchemists?\n\nNatural transmutation was applied consciously to modern physics first by Frederick Soddy when he, along with Ernest Rutherford, discovered that radioactive thorium was converting itself into radium in 1901. At the moment of realization, Soddy later recalled, he shouted out: "Rutherford, this is transmutation!" Rutherford snapped back, "For Christ's sake, Soddy, don't call it transmutation. They'll have our heads off as alchemists."\n\nSo, you should study to be a Nuclear Physisicist.
192992
Kind of.  The more electrons/protons, the stronger the pull.  The stronger the electromagnetic pull, the tighter the atom will be.
274792
No matter how large a number you can think of, I can say, "Add one to it," and you have a bigger number. There is no limit. This is known as "infinity."
904375
if the atomic number changes, it becomes a different element\n\neach atomic number corresponds to a different element on the periodic table\n\nif hydrogen gains a proton, its atomic number goes up by one and it becomes helium
73838
Its' probably a rounding error. It would depend on which masses for the elements you use, how precise you want to be.
329767
You might be looking for information on alchemy, not chemistry.  The two fields of study are very seperate these days.  Of course, modern scientits could turn lead into gold by nuclear fusion, or turn heavier elements into gold by fission- neither process seems practical.
1090881
Although our computing tools (such as our brain) are finite, but they can touch infinity through mathematical induction or recursion.\n\nFeeling finit ocuures for a neural network, when the data stored in it is going to overfow the nerons capacity.
938332
I think you mean at the atomic level, but still the answer is no.\n\nOne counter example would be positronium. This is when an electron and its anti particle, a positron, "revolve" around each other.  This is very unstable with a half-life of about 10^-7 seconds. \n\nThere are other exotic atoms of this type. Any atom formed by a particle and its anti particle is called an onia.
701573
a radioactive element is unstable because it has too many neutrons in its nucleus.
134686
An atom of neon has an atomic mass of 20