In the 1980s and 1990s, Roberto noted, scientists at the GSI Helmholtz Centre for Heavy Ion Research in Darmstadt, Germany, ran “cold fusion” experiments that extended the periodic table from ...

There are currently 118 known elements listed on the periodic table; from hydrogen ... with vaporized ions, or charged atoms, ...

They all have a link to the periodic table, which turned 150 in 2019 ... Curium is made by bombarding plutonium with helium ions and makes this list because its compounds glow in the dark.

The ions formed have a full outer electron shell, so are very stable. See the study guide on groups in the periodic table for more information.