(chemistry) Used to form prototype names for as-yet undiscovered elements, when prepended to the known element above them in the same group of the periodic table.

(chemistry) unbiunium / (chemistry) untriennium (dvi-lanthanum)

(chemistry, archaic) gallium

(chemistry) scandium

Synonym of tennessine

unbinilium

ununennium

moscovium

(dated) The unstable, radioactive, chemical element with atomic number 118, now named oganesson.

nihonium