Collect information regarding periodical development of fundamental principles and structure of atom with different atomic models and display them information chart
Answers
Explanation:
modern modern periodic table
Answer:
Explanation:
Periodical development of fundamental particles :
About 2600yrs ago, an Indian sage called Kanada actual called by name Kasyapa proposed that all forms of matter are composed of very small particles called as Anu and each anu may be made up of still smaller particle called Parmanu.
Later Democritus called these atoms [ greek Word "Atomio " meaning indivisible "
John Dalton atomic theory described elements in terms of atoms which he believed to be small , indivisible particles.
Later John Dalton's Postulate Atom is indivisible is disproved because through various experiments conducted by scientist three fundamental particles were discovered
Electron --- By J.J Thomson in 1897
Proton --- By Gold Stein in 1920
Neutron --- By James Chadwick in 1932
Structure of Atom:
Thomson Atomic model:
After the discovery of electrons J.J Thomson proposed his Plum Pudding model which shows electrons embedded through out the mass of positively charged material.
Rutherford alpha scattering experiment led to discovery of atomic nucleus.
Neil Bohr modified Rutherford Model of the atom by stating that electrons move in specific energy levels around Nucleus of atom.
Later Bohr Sommerfeld model though successful in accounting for the spectral line of H2 spectra but did not provide satisfactory picture of the structure of atom in general.
At last A quantum mechanical model of atom was developed by Erwin Schrodinger. According to this model, electrons are present in a particular region or space around the nucleus called as Orbital where probability of finding electrons are more.