A t o m i c  S t r u c t u r e
 
Overview of topic Structure of Atoms Isotopes Electronic Arrangement Electronic Structure and the Periodic Table Ions Atom...
Today’s Menu <ul><li>What is an atom </li></ul><ul><li>Structure of an atom </li></ul><ul><li>Relative charges and approxi...
What is an atom?
What is an atom <ul><li>All matters are made up of atoms </li></ul><ul><li>Atoms are extremely small in size </li></ul>
What is an atom <ul><li>Picture of lithium atoms in the compound lithium cobalt oxide </li></ul><ul><li>Taken with a trans...
What is an atom <ul><li>An atom consists of 3 subatomic particles: </li></ul><ul><li>Protons </li></ul><ul><li>Neutrons </...
Structure of an Atom
Structure of an Atom Protons and Neutrons + Electrons Nucleus Shells
Structure of an Atom Shells
Structure of an Atom Electrons Shells
Structure of an Atom Protons and Neutrons + Electrons Nucleus Shells
Structure of an Atom
Relative charges and approximate relative masses
<ul><li>One hydrogen atom weighs as much as 1836 electrons </li></ul><ul><li>Found around the nucleus. </li></ul>1/1840 (n...
Symbol of an atom
 
Symbol of an atom E.g. Chemical Symbol Nucleon Number Proton Number
Proton number, nucleon number
Proton number <ul><li>Proton number (atomic number) </li></ul><ul><li>The number of protons in an  </li></ul><ul><li>atom ...
Nucleon number <ul><li>Nucleon number (mass number) </li></ul><ul><li>=  no. of protons + no. neutrons </li></ul><ul><li>N...
Example <ul><li>Given  ,  </li></ul><ul><li>(a) What is the proton number? </li></ul><ul><li>Ans:  29 </li></ul><ul><li>Wh...
Summary
Summary <ul><li>Structure of an atom </li></ul><ul><li>Relative charges and approximate relative masses of protons, neutro...
Summary <ul><li>Symbol of an atom </li></ul><ul><li>Proton number, nucleon number </li></ul>Chemical Symbol Nucleon Number...
Any Questions
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Structure Of Atoms

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Structure Of Atoms

  1. 1. A t o m i c S t r u c t u r e
  2. 3. Overview of topic Structure of Atoms Isotopes Electronic Arrangement Electronic Structure and the Periodic Table Ions Atomic Structure
  3. 4. Today’s Menu <ul><li>What is an atom </li></ul><ul><li>Structure of an atom </li></ul><ul><li>Relative charges and approximate </li></ul><ul><li>relative masses of proton, neutron and an electron </li></ul><ul><li>Symbol of an atom </li></ul><ul><li>Proton number, nucleon number </li></ul>
  4. 5. What is an atom?
  5. 6. What is an atom <ul><li>All matters are made up of atoms </li></ul><ul><li>Atoms are extremely small in size </li></ul>
  6. 7. What is an atom <ul><li>Picture of lithium atoms in the compound lithium cobalt oxide </li></ul><ul><li>Taken with a transmission electron microscope, which can magnify objects up to 500,0000 times </li></ul>
  7. 8. What is an atom <ul><li>An atom consists of 3 subatomic particles: </li></ul><ul><li>Protons </li></ul><ul><li>Neutrons </li></ul><ul><li>Electrons </li></ul><ul><li>Atom is a particle which is electrically neutral </li></ul><ul><li>No. of protons = No. of electrons </li></ul>
  8. 9. Structure of an Atom
  9. 10. Structure of an Atom Protons and Neutrons + Electrons Nucleus Shells
  10. 11. Structure of an Atom Shells
  11. 12. Structure of an Atom Electrons Shells
  12. 13. Structure of an Atom Protons and Neutrons + Electrons Nucleus Shells
  13. 14. Structure of an Atom
  14. 15. Relative charges and approximate relative masses
  15. 16. <ul><li>One hydrogen atom weighs as much as 1836 electrons </li></ul><ul><li>Found around the nucleus. </li></ul>1/1840 (negligible) -1 Electron (e - ) <ul><li>Mass is the same as that of a hydrogen atom </li></ul><ul><li>Found in the nucleus of the atom </li></ul>1 0 Neutron (n) <ul><li>Mass is the same as that of a hydrogen atom </li></ul><ul><li>Found in the nucleus of the atom </li></ul>1 +1 Proton (p) Remarks Relative Mass Charge Particle
  16. 17. Symbol of an atom
  17. 19. Symbol of an atom E.g. Chemical Symbol Nucleon Number Proton Number
  18. 20. Proton number, nucleon number
  19. 21. Proton number <ul><li>Proton number (atomic number) </li></ul><ul><li>The number of protons in an </li></ul><ul><li>atom </li></ul><ul><li>For an atom, </li></ul><ul><li>no. of protons = no. electrons </li></ul>
  20. 22. Nucleon number <ul><li>Nucleon number (mass number) </li></ul><ul><li>= no. of protons + no. neutrons </li></ul><ul><li>No. of Neutrons </li></ul><ul><li>= Nucleon number – Proton number </li></ul>
  21. 23. Example <ul><li>Given , </li></ul><ul><li>(a) What is the proton number? </li></ul><ul><li>Ans: 29 </li></ul><ul><li>What is the number of electrons in Cu atom? </li></ul><ul><li>Ans: 29 </li></ul><ul><li>(c) What is the nucleon number? </li></ul><ul><li>Ans: 64 </li></ul><ul><li>(d) What is the number of neutrons? </li></ul><ul><li>Ans: 64-29=53 </li></ul>
  22. 24. Summary
  23. 25. Summary <ul><li>Structure of an atom </li></ul><ul><li>Relative charges and approximate relative masses of protons, neutrons and electrons </li></ul>+ Electrons Nucleus Protons and Neutrons
  24. 26. Summary <ul><li>Symbol of an atom </li></ul><ul><li>Proton number, nucleon number </li></ul>Chemical Symbol Nucleon Number Proton Number
  25. 27. Any Questions
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