Nuclear Fusion.
Particle accelerator
Nuclear fusion reaction
The range of elements found on earth were formed by some supernova explosion in the distant past, and somehow the earth was formed from the debris and then captured by the sun. Fusion must have been involved though the exact course of these events can only be surmised. Nuclear fusion has not been used on earth to create synthetic elements, and in fact has only been produced in a few places for very short times, less than one second. You are probably thinking of nuclear fission, where operation of nuclear reactors does produce synthetic elements such as plutonium. These are called the transuranic elements.
Nuclear
nuclear fusion reaction
Synthetic elements are usually radioactive, but not necessarily so. It is conceivable for a non-radioactive neutral atom to be produced by a nuclear spallation reaction.
I've never actually studies physics at A-level or degree level, but I'm pretty sure this is an example of nuclear fusion. Physicists; please correct me if I'm wrong!
Creation of synthetic elements in the laboratory is not based on nuclear fusion.
Synthetic elements are obtained by nuclear reactions.
Synthetic elements are obtained: - in nuclear reactors - as a result (in debris) of nuclear weapons explosions - with the aid of particle accelerators
in nuclear reactors and particle accelerators
Particle accelerator
When nuclear particles are forced to crash into one another
Particle Accelerators.
Scientists make synthetic elements by forcing nuclear particles to crash into one another.
Nuclear fusion reaction
Usually uranium, can also be plutonium