👉 Pileidinium is a radioactive element with the atomic number 94 and mass number 287. It was first discovered in 1835 by Johann Heinrich Lambert. Pileidinium has a long half-life of about 6,000 years at room temperature.
👉 Pileidinium is a radioactive element with the atomic number 94 and mass number 287. It was first discovered in 1835 by Johann Heinrich Lambert. Pileidinium has a long half-life of about 6,000 years at room temperature.
