Atoms and electronic structure

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Presentation transcript:

Atoms and electronic structure WALT Recap element names Protons, neutrons, electrons Electronic structures Groups and periods Ionisation energy

Draw the electronic structure of the elements in periodic table

History of the atom WALT: State that the model of the atom has changed over time. Describe the experiments which have led to our current understanding of the model of the atom. Explain ionisation energies using graphs and data.

Plum pudding model – Thomson.

Rutherfords scattering experiment https://www.bing.com/videos/search?q=Rutherford%27s+Gold+Foil+ Experiment+Lab&&view=detail&mid=3B120FAD330C7FCAE2C83B120 FAD330C7FCAE2C8&&FORM=VRDGAR How did Rutherford show that the nucleus must contain the positive particles and that the negative particles were orbiting around the centre? START HERE.

Ernest Rutherford – Planetary model

The positive alpha particles were scattered all around the detector The positive alpha particles were scattered all around the detector. Some went straight through, some were deflected.

Bohr‘s Planetary model

Chadwick‘s Planetary model.

Ionisation energy https://www.youtube.com/watch?v=hePb00CqvP0 Ionization energy is given a number of symbols including I, E, and I.E. Ionization energy is measured in kilojoules per mole (kJ mol-1) or electronvolts per atom (eV)*. (1 kJ/mol = 96.4869 x eV) Ionization energy, or ionisation energy, is the energy required to remove an electron from a gaseous atom or ion.

Ionisation energy table for the 2nd period of elements Ionisation energy table for the 2nd period of elements. „A period is just a term for a row, it has the same shell where the electrons go“ Task = Draw a graph with the ionisation energies for the different elements.