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 always occurs with niobium. The only source of tantalum in North America is a mine located at Bernic Lake in the province of Manitoba in Canada. Most of the tantalum used in the United States comes from Australia, Germany, Thailand, and Brazil. Isotopes There are two naturally occurring isotope of tantalum, tantalum-180 and tantalum-181.