The chemical elements are the building blocks of all visible matter in our universe. It’s important to remember that everything on earth, in fact everything in the Galaxy and the Universe are made of the same 92 chemical elements (this number is subject to debate and can be quoted as 88 or 94 depending on opinion ‘naturally occurring does not necessarily mean abundant some elements have been found in tiny or trace amounts). The elements that have an atomic number greater than 92 are unstable and have been created artificially in laboratories. This is achieved by colliding the nuclei of 2 atoms together at high energies for example to make the newly named Flerovium you need to take a heavy element Plutonium 94 and a light one calcium 20 which when collided together give a mass of 114 . Flerovium. Unlike the naturally occurring elements, the nuclei of these elements are highly unstable and so only last for a short amount of time before decaying (radioactive decay). So while it may not last long enough to react, chemists are able to predict the properties of the element from where it sits in the periodic table.