Keywords |
  • Chemistry


Plutonium is a radioactive chemical element. Its atomic number is 94.

Its most stable isotope occurs in very small quantities on Earth. It is a solid at room temperature and its melting point is 640°C. Its density is 19.84 g cm-3.

Plutonium was discovered by Glenn T. Seaborg, Edwin M. McMillan, J. W. Kennedy and A. C. Wahl (United States) in 1940.


Fill out my online form.