logging in or signing up Atomic Structure aSGuest122592 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 31 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: December 23, 2011 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript PowerPoint Presentation: ATOMIC STRUCTURE S.MORRIS 2006PowerPoint Presentation: HISTORY OF THE ATOM 460 BC Democritus develops the idea of atoms he pounded up materials in his pestle and mortar until he had reduced them to smaller and smaller particles which he called ATOMA ( greek for indivisible )PowerPoint Presentation: HISTORY OF THE ATOM 1808 John Dalton suggested that all matter was made up of tiny spheres that were able to bounce around with perfect elasticity and called them ATOMSPowerPoint Presentation: HISTORY OF THE ATOM 1898 Joseph John Thompson found that atoms could sometimes eject a far smaller negative particle which he called an ELECTRONPowerPoint Presentation: HISTORY OF THE ATOM Thompson develops the idea that an atom was made up of electrons scattered unevenly within an elastic sphere surrounded by a soup of positive charge to balance the electron's charge 1904 like plums surrounded by pudding. PLUM PUDDING MODELPowerPoint Presentation: HISTORY OF THE ATOM 1910 Ernest Rutherford oversaw Geiger and Marsden carrying out his famous experiment. they fired Helium nuclei at a piece of gold foil which was only a few atoms thick. they found that although most of them passed through. About 1 in 10,000 hitPowerPoint Presentation: HISTORY OF THE ATOM gold foil helium nuclei They found that while most of the helium nuclei passed through the foil, a small number were deflected and, to their surprise, some helium nuclei bounced straight back. helium nucleiPowerPoint Presentation: HISTORY OF THE ATOM Rutherford’s new evidence allowed him to propose a more detailed model with a central nucleus . He suggested that the positive charge was all in a central nucleus. With this holding the electrons in place by electrical attraction However, this was not the end of the story.PowerPoint Presentation: HISTORY OF THE ATOM 1913 Niels Bohr studied under Rutherford at the Victoria University in Manchester. Bohr refined Rutherford's idea by adding that the electrons were in orbits . Rather like planets orbiting the sun. With each orbit only able to contain a set number of electrons.PowerPoint Presentation: Bohr’s Atom electrons in orbits nucleusPowerPoint Presentation: HELIUM ATOM + N N + - - proton electron neutron Shell What do these particles consist of?PowerPoint Presentation: ATOMIC STRUCTURE Particle proton neutron electron Charge + ve charge -ve charge No charge 1 1 nil MassPowerPoint Presentation: ATOMIC STRUCTURE the number of protons in an atom the number of protons and neutrons in an atom He 2 4 Atomic mass Atomic number number of electrons = number of protonsPowerPoint Presentation: ATOMIC STRUCTURE Electrons are arranged in Energy Levels or Shells around the nucleus of an atom. first shell a maximum of 2 electrons second shell a maximum of 8 electrons third shell a maximum of 8 electronsPowerPoint Presentation: ATOMIC STRUCTURE There are two ways to represent the atomic structure of an element or compound; 1. Electronic Configuration 2. Dot & Cross DiagramsPowerPoint Presentation: ELECTRONIC CONFIGURATION With electronic configuration elements are represented numerically by the number of electrons in their shells and number of shells. For example; N Nitrogen 7 14 2 in 1 st shell 5 in 2 nd shell configuration = 2 , 5 2 + 5 = 7PowerPoint Presentation: ELECTRONIC CONFIGURATION Write the electronic configuration for the following elements; Ca O Cl Si Na 20 40 11 23 8 17 16 35 14 28 B 11 5 a) b) c) d) e) f) 2,8,8,2 2,8,1 2,8,7 2,8,4 2,3 2,6PowerPoint Presentation: DOT & CROSS DIAGRAMS With Dot & Cross diagrams elements and compounds are represented by Dots or Crosses to show electrons, and circles to show the shells. For example; Nitrogen N X X X X X X X N 7 14PowerPoint Presentation: DOT & CROSS DIAGRAMS Draw the Dot & Cross diagrams for the following elements; O Cl 8 17 16 35 a) b) O X X X X X X X X Cl X X X X X X X X X X X X X X X X X XPowerPoint Presentation: SUMMARY The Atomic Number of an atom = number of protons in the nucleus. The Atomic Mass of an atom = number of Protons + Neutrons in the nucleus. The number of Protons = Number of Electrons. Electrons orbit the nucleus in shells . Each shell can only carry a set number of electrons.PowerPoint Presentation: This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching. You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
Atomic Structure aSGuest122592 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 31 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: December 23, 2011 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript PowerPoint Presentation: ATOMIC STRUCTURE S.MORRIS 2006PowerPoint Presentation: HISTORY OF THE ATOM 460 BC Democritus develops the idea of atoms he pounded up materials in his pestle and mortar until he had reduced them to smaller and smaller particles which he called ATOMA ( greek for indivisible )PowerPoint Presentation: HISTORY OF THE ATOM 1808 John Dalton suggested that all matter was made up of tiny spheres that were able to bounce around with perfect elasticity and called them ATOMSPowerPoint Presentation: HISTORY OF THE ATOM 1898 Joseph John Thompson found that atoms could sometimes eject a far smaller negative particle which he called an ELECTRONPowerPoint Presentation: HISTORY OF THE ATOM Thompson develops the idea that an atom was made up of electrons scattered unevenly within an elastic sphere surrounded by a soup of positive charge to balance the electron's charge 1904 like plums surrounded by pudding. PLUM PUDDING MODELPowerPoint Presentation: HISTORY OF THE ATOM 1910 Ernest Rutherford oversaw Geiger and Marsden carrying out his famous experiment. they fired Helium nuclei at a piece of gold foil which was only a few atoms thick. they found that although most of them passed through. About 1 in 10,000 hitPowerPoint Presentation: HISTORY OF THE ATOM gold foil helium nuclei They found that while most of the helium nuclei passed through the foil, a small number were deflected and, to their surprise, some helium nuclei bounced straight back. helium nucleiPowerPoint Presentation: HISTORY OF THE ATOM Rutherford’s new evidence allowed him to propose a more detailed model with a central nucleus . He suggested that the positive charge was all in a central nucleus. With this holding the electrons in place by electrical attraction However, this was not the end of the story.PowerPoint Presentation: HISTORY OF THE ATOM 1913 Niels Bohr studied under Rutherford at the Victoria University in Manchester. Bohr refined Rutherford's idea by adding that the electrons were in orbits . Rather like planets orbiting the sun. With each orbit only able to contain a set number of electrons.PowerPoint Presentation: Bohr’s Atom electrons in orbits nucleusPowerPoint Presentation: HELIUM ATOM + N N + - - proton electron neutron Shell What do these particles consist of?PowerPoint Presentation: ATOMIC STRUCTURE Particle proton neutron electron Charge + ve charge -ve charge No charge 1 1 nil MassPowerPoint Presentation: ATOMIC STRUCTURE the number of protons in an atom the number of protons and neutrons in an atom He 2 4 Atomic mass Atomic number number of electrons = number of protonsPowerPoint Presentation: ATOMIC STRUCTURE Electrons are arranged in Energy Levels or Shells around the nucleus of an atom. first shell a maximum of 2 electrons second shell a maximum of 8 electrons third shell a maximum of 8 electronsPowerPoint Presentation: ATOMIC STRUCTURE There are two ways to represent the atomic structure of an element or compound; 1. Electronic Configuration 2. Dot & Cross DiagramsPowerPoint Presentation: ELECTRONIC CONFIGURATION With electronic configuration elements are represented numerically by the number of electrons in their shells and number of shells. For example; N Nitrogen 7 14 2 in 1 st shell 5 in 2 nd shell configuration = 2 , 5 2 + 5 = 7PowerPoint Presentation: ELECTRONIC CONFIGURATION Write the electronic configuration for the following elements; Ca O Cl Si Na 20 40 11 23 8 17 16 35 14 28 B 11 5 a) b) c) d) e) f) 2,8,8,2 2,8,1 2,8,7 2,8,4 2,3 2,6PowerPoint Presentation: DOT & CROSS DIAGRAMS With Dot & Cross diagrams elements and compounds are represented by Dots or Crosses to show electrons, and circles to show the shells. For example; Nitrogen N X X X X X X X N 7 14PowerPoint Presentation: DOT & CROSS DIAGRAMS Draw the Dot & Cross diagrams for the following elements; O Cl 8 17 16 35 a) b) O X X X X X X X X Cl X X X X X X X X X X X X X X X X X XPowerPoint Presentation: SUMMARY The Atomic Number of an atom = number of protons in the nucleus. The Atomic Mass of an atom = number of Protons + Neutrons in the nucleus. The number of Protons = Number of Electrons. Electrons orbit the nucleus in shells . Each shell can only carry a set number of electrons.PowerPoint Presentation: This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.