Class 2 How Atoms combine with similar and dissimilar atoms

1. Class 2How Atoms combine with similar and dissimilar atoms Periodic table Electron configurations Energies Bond types Bond types and properties.

2. 

3. Atomic Model

4. Electron States

6. Electron Filling of Orbitals 1s 2s 2p 3s 3p 3d 4s 4p 4d Z = 46 1s 2s 2p 3s 3p 3d 4s 4p 36 1s 2s 2p 3s 3p 3d 4s 30 1s 2s 2p 3s 3p 4s 20 1s 2s 2p 3s 12 1s 2s 2p 10 1s 2s 4 1s 2 On Ionisation, 4s levels empties first.

7. Filling of Shells Electrons shells like to be full, half full or empty. Full shells � inert status, for example helium Full or empty, between elements by ionic or covalent bonding. Metallic bonding � sharing of electrons.

8. Periodic Table Rows � number of shells 1,2,3,4 etc Column � number of electrons in outer shell Columns have like properties as number of electrons in outer shell same. Atomic number � number of electrons and so protons in atom. Different number of electrons changes properties and produces elements

9. Bonding Types Between like atoms � metallic or covalent Between different atoms � metallic, ionic or covalent. Primary � ionic, covalent and metallic. strong Secondary � hydrogen, van der Waals. weak.

11. Ionic Bonding

12. Covalent Bonding

13. Metallic Bonding

14. Metallic Conductivity

15. Bond Energy and Properties

16. Secondary Bonding Hydrogen � needs presence of hydrogen, single electron effect, non crystalline normally Van Der Waals � dipole type bonding, due to slight charge imbalance with distance. Non crystalline normally.

17. Secondary Bonding

18. Homework How does calcium and flourine bond to each other? How does aluminum bond to other aluminum atoms and how does silicon bond to other silicon atoms? Why are metals conductive?