Atomic Structure for science for secondary level.pptx

structure atomic science

1. Atomic Structure Science Slc Atomic Structure Name : John Grade:8 Subject : Science

2. Introduction of Atom Atom = is the smallest unit of matter Everything is made up of Atoms:Air,Water,Plants,Poeple Fun Fact : Single Human Body has about 7 octilion Atoms

3. History Of Atom Theory Democritus (400 BC): Atomos = Indivisible Dalton (1803):Atom are Solid Spheres Thomson (1897): Discovered Electron Plum Pudding Model RutherFord (1911): Dense And Nucleus Is Mostly Empty Space Bohr (1913): Electrons in fixed shells Modern Quantum Model:Electron in Probability Clouds .

4. Thomson ModeL Plum Pudding Model ( electrons in positive sphere )