the density of an atom is concentrated in the unit cell.
where is the density of an atom concentrated?
the unit cell
rutherford model





























the rutherford model was devised by ernest rutherford to describe an atom. rutherford directed the geiger–marsden experiment in 1909 which suggested, upon rutherford's 1911 analysis, that j. j. thomson's plum pudding model of the atom was incorrect. rutherford's new model for the atom, based on the experimental results, contained new features of a relatively high central charge concentrated into a very small volume in comparison to the rest of the atom and with this central volume also containing the bulk of the atomic mass of the atom. this region would be known as the "nucleus" of the atom.
rutherford model
paul hillemacher





























paul joseph guillaume hillemacher (25 november 1852 – 13 august 1933) was a french composer and classical pianist.





























section::::life.





























born in paris, hillemacher studied at the conservatoire de paris in françois bazin's class. second prize for harmony in 1870, first runaway in fugue two years later, he won, in 1873 a second prix de rome then, in 1876, the premier grand prix de rome with his cantata "judith". he composed many stage music, operas, symphonies and melodies.
paul hillemacher