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.
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 239 Pu, with a half-life of 24,100 years. It can be made from natural uranium and is fissile.The most stable isotope is 244 Pu, with a half-life of about 80 million years, long enough to be found in extremely small quantities in nature.lutonium-239 is one of the three fissile materials used for the production of nuclear weapons and in some nuclear reactors as a source of energy. The other fissile materials are uranium-235 and uranium-233. Plutonium-239 is virtually nonexistent in nature.