Structure of atom2

294 views

Published on

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
294
On SlideShare
0
From Embeds
0
Number of Embeds
9
Actions
Shares
0
Downloads
6
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Structure of atom2

  1. 1. Examination  Paper 1 (50 marks)  50 objective questions  Paper 2 (100 marks)  Section A, structure – 6 Questions (60 Marks)  Section B, essay – 2 Questions, Choose only 1 question (20 Marks)  Section C, essay– 2 Questions, Choose only 1 question (20 Marks)  Paper 3 (50 Marks)- Experiment  Question 1 – 33 marks (Structure)  Question 2 – 17 marks (Report Experiment)
  2. 2. Experiment 1  To determine the Melting and Freezing point of Naphthalene/Acetamide.Draw the procedure for this experiment in your exercise book and bring it on:  Date: Friday (11/1/13)  Time: 2.45p.m.  Venue: Chemistry Lab  Wear shoes and proper school uniform  Don’t bring any food, drink and school bag in the lab.
  3. 3. Report Submit: Monday  Name  Class  Aim  Problem statement  Hypothesis Variables (manipulated, responding, fixed)  Apparatus  Materials  Procedure  Result (In table & plot graph)  Inference  Calculation if necessary  Discussion (Questions will be given)  Conclusion
  4. 4. THE STRUCTURE OF THE ATOM Chapter 2
  5. 5. In this chapter, you will learn to: Analyse matter Synthesise the atomic structure Understanding isotopes and their uses Understanding the electronic structure of an atomAppreciate the orderliness and uniqueness of the atomic structure.
  6. 6. AssignmentDevelopment of Atomic Models Group 1: John Dalton’s Model – 4 members Group 2: J.J. Thomson’s Model - 3 members Group 3: Ernest Rutherford’s Model– 4 members Group 4: Neils Bohr’s Model - 4 members Group 5: James Chadwick’s Model– 4 members
  7. 7. Symbol of ElementsElements SymbolHydrogen Lithium SodiumPotassiumBerylliumMagnesium Calcium BoronAluminium Carbon
  8. 8. Continue…Elements Symbol Silicon NitrogenPhosphorus Oxygen Sulphur Fluorine Chlorine Helium Neon Argon
  9. 9. 2.2 Atomic StructureAn atom contains three types of subatomic particles: Particles Symbol Relative Relative mass charge Proton p +1 1 Neutron n 0 1 Electron e -1 1/1840The protons and neutrons are found in the nucleus, while the electrons move around the nucleus in fixed orbits.The nucleus is positively charged because of the presence of protons, which are positively charged. The neutrons are neutral.
  10. 10. Continue…A neutral atom contains the same number of electrons as the protons.Example:  An Aluminium atom contains 13 protons and 13 electrons.The number of protons in the nucleus of an atom is called its proton number (atomic number).The total number of protons and neutrons in the nucleus is the nucleon number (mass number). Nucleon Number = Number of Proton + Number of Neutron
  11. 11. Exercises1. An element P has a nucleon number of 31 and a proton number of 15. Find the number of protons, electrons and neutrons in the atom.
  12. 12. The atom of an element is written with its symbol, nucleon number and proton numbers as follows: Nucleon number a Proton numberExample: b Y Symbol 40 20 Ca  This means that a calcium atom has 20 protons and (40 – 20 ) = 20 Neutrons.

×