Marie+Curie!+(Claire&Elizabeth;+A3)

  Marie Curie! -Curie and her husband Pierre believed mostly in John Dalton's atomic theory. They did, however, disprove of one of his postulates, that atoms were indivisible, by discovering and isolating radium. Radium disintigrated spontaneously; it had to be divisible to change into other elements.

Basic Theory -Atoms can neither be created nor destroyed. -Are identical in the same element -Compounds are formed by two or more types of elements.

Problems with Theory -Not all the atoms in an element are exactly the same. Elements have isotopes, which have the same //properties,// but not the same atomic mass or atomic number. - Atoms //can// be destroyed, but by nuclear reaction and not a chemical one.

About Marie Curie -Born in Warsaw, Poland on November 7, 1867. -Went to Paris in 1891 to continue her studies at the Sorbonne.

Sources -www.ucc.ie/academic/chem/dolchem/html/dict/atom.html -www.iun.edu/~epanhd/c101webnotes/composition/dalton.html -www.merriam-webster.com/dictionary/isotope