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.
Each leaf on a poison ivy plant has three smaller leaflets. Contact with any part of the poison ivy plant can cause red, swollen skin, blisters and severe itching, sometimes within hours after exposure. A poison ivy rash usually resolves on its own within a few weeks. In the meantime, soothe irritated skin with an over-the-counter topical treatment, such as calamine lotion. Oatmeal baths and cool compresses also might be helpful. Consult your doctor if you have a severe poison ivy rash or if the rash involves your face or genital area.