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Atomic Structure   Isotopes
 

Atomic Structure Isotopes

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  • great presentation please download some ppt on different atoms and there atomic structure
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  • Pace;content; more interactiveHow many monomers to make polymer… molecular weight…Polymerisation does not only occur at high temperature… gas phase high presesure (polyethene)Dun generalize. High pressure for high density polymers… lower lower density.. Branched/unbranched…? Carbo, proteins n DNA are natural polymers… fats are not… C to C.. Cations to cathodesElectrolytes are salts mols that dissolve in water to ions that can conduct electrons..
  • Where in the atoms are these sub-atomic particles found?
  • Pace;content; more interactiveHow many monomers to make polymer… molecular weight…Polymerisation does not only occur at high temperature… gas phase high presesure (polyethene)Dun generalize. High pressure for high density polymers… lower lower density.. Branched/unbranched…? Carbo, proteins n DNA are natural polymers… fats are not… C to C.. Cations to cathodesElectrolytes are salts mols that dissolve in water to ions that can conduct electrons..

Atomic Structure   Isotopes Atomic Structure Isotopes Presentation Transcript

  • Lesson Objectives
    1. Recap Atomic Structure
    NEW
    2. Isotopes
  • Lesson Objectives
    1. Recap Atomic Structure
    NEW
    2. Isotopes
  • Recap on Atomic Structure
    Structure of atom
    B. Relative masses and charges of proton, neutron and electron
    C. Chemical symbols
    D. Electronic configuration
  • Recap on Atomic Structure
    Structure of atom
    B. Relative masses and charges of proton, neutron and electron
    C. Chemical symbols
    D. Electronic configuration
  • The Atomic Structure
  • What is an Atom?
    Atoms are the smallest particle of an element.
  • What is an Element?
    pure
    • An element is a ____ substance that cannot be _____up into 2 or more simpler substances by chemical processes.
    spilt
  • The Story of Atoms
    Atoms have positive charges concentrated in their small nucleus!
    There are neutrons!
    Ernest Rutherford (1871 -1937)
    Democritus 460 BC
    Sir James Chadwick
    (1891 -1974)
    Joseph John Thompson (1856-1940)
    Niels Bohr
    (1885-1962)
    ATOMA
    PLUM PUDDING
    MODEL
    1898
  • Bohr’s Atom
    electrons in orbits
    nucleus
    http://www.chem.iastate.edu/group/Greenbowe/sections/projectfolder/flashfiles/atom.swf
  • Structure of Atom
    An atom consists mostly of empty space.
    A positively charged nucleus, densely concentrated in the centre.
    The nucleus contains protons and neutrons, which are tightly packed.
    Negatively charged electrons move around the nucleus in fixed orbits or paths.
    10
  • Recap on Atomic Structure
    Structure of atom
    B. Relative masses and charges of proton, neutron and electron
    C. Chemical symbols
    D. Electronic configuration
  • Recap on Atomic Structure
    Structure of atom
    B. Relative masses and charges of proton, neutron and electron
    C. Chemical symbols
    D. Electronic configuration
  • Relative Charges & Relative Masses Of Protons, Neutrons & Electrons
    • When No. of proton = no. of electrons in an atom
    • It is electrically neutral
    • It has no net charge.
  • Recap on Atomic Structure
    Structure of atom
    B. Relative masses and charges of proton, neutron and electron
    C. Chemical symbols
    D. Electronic configuration
  • Recap on Atomic Structure
    Structure of atom
    B. Relative masses and charges of proton, neutron and electron
    C. Chemical symbols
    D. Electronic configuration
  • Interpreting Chemical Symbol
    O
    16
    Mass=P+N
    mass number
    (nucleon number)
    mass number is the total number of protons and neutrons in an atom.
    Number of neutrons in the oxygen atom is: 16 – 8 = 8.
    chemical symbol
    8
    proton number
    (atomic number)
    atomic number (proton number) is the number of protons in an atom.
    Each oxygen atom has 8 protons.
    As the number of electrons is equal to the number of protons in an atom, each oxygen atom contains 8 electrons.
    P=E
    No. of protons= no. of electrons
    16
  • Recap on Atomic Structure
    Structure of atom
    B. Relative masses and charges of proton, neutron and electron
    C. Chemical symbols
    D. Electronic configuration
  • Recap on Atomic Structure
    Structure of atom
    B. Relative masses and charges of proton, neutron and electron
    C. Chemical symbols
    D. Electronic configuration
  • The Electronic Configuration of Atoms
    Mass number
    (Nucleon)
    O
    16
    O
    8
    Atomic
    number
    (Proton)
  • The Electronic Configuration of Atoms
    Mg
  • Summary for Atomic Structure (I)
    The structure of an atom
    The relative charges & relative masses of proton, neutron & electron
    Defined mass number & atomic number
    Learnt how to interpret chemical symbols
    The electronic configuration of atoms
  • Lesson Objectives
    1. Recap Atomic Structure
    NEW
    2. Isotopes
  • Today…
    Isotopes
  • Isotopes
    1. Definition of Isotopes
    2. Uses of Isotopes
  • Isotopes
    1. Definition of Isotopes
    2. Uses of Isotopes
  • Activity
    Find your fellow group members! (1min)
  • Definition of Isotopes
    Isotopes are atoms of the same element which contains the same number of protons but different number of neutrons.
    Same P different n
  • Isotopes
    mass number
    O
    O
    17
    O
    18
    16
    proton number
    8
    8
    8
    Oxygen-17
    Oxygen-18
    Oxygen-16
    n = 8
    n = 17 – 8
    = 9
    n = 18 – 8
    = 10
  • Isotopes
    Isotopes have the same chemical properties but slightly different physical properties
  • Q. Do all Isotopes of the same element have the same mass?
  • Isotopes
    1. Definition of Isotopes
    2. Uses of Isotopes
  • Pair Work
  • Uses of Radioactive Isotopes
    Food irradiation
    Archaeological dating (carbon-dating)
    Smoke detectors
    Radioactive tracers
  • Summary
    Recap on Atomic Structure
    1. Definition of Isotopes
    2. Uses of Isotopes
  • Definition of Isotopes
    Isotopes are atoms of the same element which contains the same number of protons but different number of neutrons.
    Same P different n
  • Quiz
    http://chemistry.about.com/library/weekly/blionquiz.htm