Element 118, the final element in our International Year of the Periodic Table series, is oganesson. Oganesson was discovered in 2002 and its properties defy our expectations based on trends in the periodic table.
Elements 116 and 117 in our International Year of the Periodic Table series are livermorium and tennessine. Tennessine, first created in 2010, is the most recently discovered element in the periodic table as of 2019.
Elements 114 and 115 in our International Year of the Periodic Table series are flerovium and moscovium. Both of these elements have only been produced in extremely small amounts, so very little is known about them.
Elements 112 and 113 in our International Year of the Periodic Table series are copernicium and nihonium – the latter of which was the first element to be discovered in an Asian country.
Elements 110 and 111 in our International Year of the Periodic Table series are darmstadtium and roentgenium – two elements that are tricky to pronounce and difficult for chemists to study.
Elements 108 and 109 in our International Year of the Periodic Table series are hassium and meitnerium. The second and third of a short series of superheavy elements discovered by German scientists, one has surprising predicted properties, while the other rights a Nobel Prize wrong.