zir kliru lujvo

x₁ is iodine.

see also: zirpu, kliru, li'orkliru, ri'orkliru, xunkliru, iodni

lensisku

In notes:

iodni: x₁ is a quantity/is made of iodine [I].
ri'orkliru: x₁ is chlorine.
xunkliru: x₁ is bromine.