Europium is the most active of the lanthanides. It is more likely to react with other elements than the other rare earth elements. Europium is quite expensive to produce, so it has few practical uses.It is used in television tubes and lasers.uropium is the most active of the lanthanides. It is more likely to react with other elements than the other rare earth elements. Europium is quite expensive to produce, so it has few practical uses.
A poisonous plant rash typically persists for 10 to 14 days. Longevity of the allergic reaction varies for each person, however, and can be longer. If symptoms last longer than a few weeks, consult a physician.
Three Methods:Taking Immediate Care of Your SkinTreating the Itch Caused by the PoisonPreventing Future ExposureCommunity Q&A. Poison ivy, oak, and sumac are a great way to ruin a day in the outdoors. Coming in contact with their toxic leaves, stems, and roots can give you an itchy rash that lasts for 1-3 weeks.