Question

Information regarding periodical development of fundamental particles and structure of atom with atomic models and display then Information chart

Answer 1

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

1. Electron --- By J.J Thomson in 1897
2. Proton --- By Gold Stein in 1920
3. 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.

Answer 2

Answer:

Explanation:

ATOM

matter is anything that occupies space ,it can be water ,stone ,sand etc.matter is made up particles ,

The smallest piece of a particle is known as an atom ..this smallest part of any element .in this case will take an element as matter is made of smaller piece.