Electronics_Devices_class_1.pdf
- 1. Dr. Ambedkar Institute of Technology Electronics Devices (19EC31) Dr. Ambedkar Institute of Technology Dr. Shilpa K.C Assistant Professor Dept. of Electronics and Communication Engineering Dr.AIT 9/3/2020 1 Prepared by Dr.Shilpa K.C, Dept of ECE
- 2. Dr. Ambedkar Institute of Technology 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 2 Introduction An Atom
- 3. Dr. Ambedkar Institute of Technology 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 3 Introduction Energy Level Diagram in an Atom • Electron capacity = 2(n2) • n = energy level
- 4. Dr. Ambedkar Institute of Technology n = energy level s,p,d,f = subshells 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 4 Energy Sublevel Diagram
- 5. Dr. Ambedkar Institute of Technology Sublevels Electrons capacity s 2 electrons p 6 electrons d 10 electrons f 14electrons 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 5 Sublevels and electrons in the subshell
- 6. Dr. Ambedkar Institute of Technology 1s 2s 2p 3s 3p 4s 3d 4p 5s 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 6 Atomic Data Representation
- 7. Dr. Ambedkar Institute of Technology 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 7 SL.NO Compound Atomic Weight Data Representation 1 Sodium (Na) 11 1s2 2s22p6 3s2 Examples of Atomic Data Representation 1s2 2s2 2p6 3s2 Energy levels Electrons capacity
- 8. Dr. Ambedkar Institute of Technology 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 8 Examples of Atomic Data Representation SL.NO Compound Atomic Weight Data Representation 1 Sodium (Na) 11 2 Chlorine (Cl) 17 3. Oxygen(02) 08 4. Nitrogen 07 5 Zinc 30 6. Iron 26
- 9. Dr. Ambedkar Institute of Technology d Examples of Atomic Data Representation SL.NO Compound Atomic Weight Data Representation 1. Sodium (Na) 11 1s2 2s22p6 3s2 2. Chlorine (Cl) 17 1s2 2s2 2p6 3s2 3p5 3. Oxygen(02) 08 1s2 2s22p4 4. Nitrogen 07 1s2 2s2 2p3 5. Zinc 30 1s2 2s22p6 3s2 3p6 4s2 3d10 6. Iron 26 1s2 2s22p6 3s2 3p6 4s2 3d6 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 9
- 10. Dr. Ambedkar Institute of Technology Chemical Bonding Chemical Bonds- Are the forces that holds atoms together to make a molecule or compound. 9/3/2020 10 Prepared by Dr.Shilpa K.C, Dept of ECE
- 11. Dr. Ambedkar Institute of Technology Ionic Bonding – Connects between Metal & Non-Metal Sodium(Na) is a Metal Chlorine (Cl) is a Non-Metal 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 11 Ionic Bonding
- 12. Dr. Ambedkar Institute of Technology 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 12 Ionic Bonding Na – 1s2 2s22p6 3s2 Cl – 1s2 2s2 2p6 3s2 3p5 Octet Rule The Octet rule refers to the tendency of atoms to prefer to have eight electrons in the valence shell.
- 13. Dr. Ambedkar Institute of Technology 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 13 Ionic Bonding
- 14. Dr. Ambedkar Institute of Technology Ionic Bonding Na + Cation Cl – Anion The atoms that have charges are called Ions The Ions have opposite charges , hence Electrostatic attractive forces bonds the atoms together 9/3/2020 14 Prepared by Dr.Shilpa K.C, Dept of ECE
- 15. Dr. Ambedkar Institute of Technology Electronics Devices (19EC31) Class 2 Dr. Ambedkar Institute of Technology Dr. Shilpa K.C Assistant Professor Dept. of Electronics and Communication Engineering Dr.AIT 9/3/2020 15 Prepared by Dr.Shilpa K.C, Dept of ECE
- 16. Dr. Ambedkar Institute of Technology Covalent Bonding Covalent Bonding – Connects between Non-Metal & Non-Metal Sharing of electrons between atoms of the same kind E.g. Formation of H2, Cl2, O2, etc. Sharing of electrons between atoms of different kind . E.g. Formation of CH4, H2O etc. 9/3/2020 16 Prepared by Dr.Shilpa K.C, Dept of ECE H – atomic number 1 – 1s1
- 17. Dr. Ambedkar Institute of Technology 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 17 Covalent Bonding O – atomic number 8 – 1s2 2s2 2p4
- 18. Dr. Ambedkar Institute of Technology 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 18 Covalent Bonding H – atomic number 1 – 1s1 F – atomic number 9 – 1s2 2s2 2p5 Sharing of electrons between atoms of different kind . E.g. Formation of CH4, H2O, HF , HCl etc.
- 19. Dr. Ambedkar Institute of Technology 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 19 Covalent Bonding H – atomic number 1 – 1s1 Cl – atomic number 17 – 1s2 2s2 2p6 3s2 3p5
- 20. Dr. Ambedkar Institute of Technology 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 20 Covalent Bonding Bonds between hydrogen and oxygen atoms in a water molecule Sharing of Electrons bonds the atoms together In Covalent Bonding
- 21. Dr. Ambedkar Institute of Technology Metallic Bonding – Connects between Metal & Metal Sodium(Na) is a Metal Valence electrons are 1 in outer most orbit 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 21 Metallic Bonding Metallic Bonding - The bond produced due to the combination of electrostatic force of attraction between the electrons and the positive nuclei of metal atoms
- 22. Dr. Ambedkar Institute of Technology 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 22 Metallic Bonding Zinc is a Metal Atomic number of Zinc is 30 1s2 2s22p6 3s23p6 4s2 3d10 Valence electrons are 2 in outer most orbit
- 23. Dr. Ambedkar Institute of Technology 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 23 Metallic Bonding Iron is a Metal Atomic number of Iron (Fe) is 26 1s2 2s22p6 3s23p6 4s2 3d6 Valence electrons are 2 in outer most orbit
- 24. Dr. Ambedkar Institute of Technology 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 24 Metallic Bonding Atomic number of Iron (Fe) is 26 1s2 2s22p6 3s23p6 4s2 3d6 Valence electrons are 2 in outer most orbit
- 25. Dr. Ambedkar Institute of Technology 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 25 Metallic Bonding • Properties of Metals 1.They are also called as Sea of Electrons 2.High Conductivity 3.High Ductility -- Can be drawn into fine wires 4.High Malleability --- Can be bend any shapes
- 26. Dr. Ambedkar Institute of Technology 1` 9/3/2020 Prepared by Dr.Shilpa K.C, Dept of ECE 26 Comparsion of the 3 Chemical Bonding Ionic Bonding Covalent Bonding Metallic Bonding Bonding between Metal and Non Metal Bonding between Non Metal and Non Metal Bonding between Metal and Metal Electrostatic attraction between positive and negative ions Sharing of electrons between atoms of the same kind or different kinds Electrostatic force of attraction between the electrons and the positive nuclei of metal atoms
- 27. Dr. Ambedkar Institute of Technology Thank You Dr. Ambedkar Institute of Technology HAVE A NICE DAY 9/3/2020 27 Prepared by Dr.Shilpa K.C, Dept of ECE