Kindergarten Number Sense Worksheets. Music Meets Math Worksheets 1-2 - Students will color one-five instruments in a set and practice printing the names of the instruments. This worksheet reinforces instrument recognition, counting to five, vocabulary, and handwriting.
Plutonium (IPA: /ËpluËËtÉÊniÉm/) is a radioactive, metallic chemical element. It has the symbol Pu and the atomic number 94. It is the element used in most modern nuclear weapons. The most significant isotope of plutonium is 239Pu, with a half-life of 24,100 years. It can be made from natural uranium and is fissile.
Plutonium-239 is also fissionable by bombardment with slow neutrons, and both it and uranium-235 have been used to make nuclear fission bombs. Plutonium-239 can be produced by  breeding  it from uranium-238. Uranium-238, which makes up 99.3% of natural uranium, is not fissionable by slow neutrons.