ri'orkliru lujvo

x₁ is chlorine.

see also: crino, kliru, li'orkliru, xunkliru, zirkliru, xlorini.

lensisku

In notes:

xlorini: x₁ is a quantity/is made of chlorine [Cl].
xunkliru: x₁ is bromine.
zirkliru: x₁ is iodine.