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IGCSE CHEMISTRY (demo)

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  1. 2. Atoms, Elements & Compounds (DEMO)
    7 Topics
  2. 3. Stoichiometry (DEMO)
    1 Topic
  3. 6. Chemical Reactions (DEMO)
    6 Topics
IGCSE CHEMISTRY (demo) 2. Atoms, Elements & Compounds (DEMO) 2.2 Atomic structure and the Periodic Table (DEMO)
Lesson 1, Topic 5
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2.2 Atomic structure and the Periodic Table (DEMO)

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Learning Outcomes

At the end of this lesson, you should be able to:

  • Describe the structure of the atom as a central nucleus containing neutrons and protons surrounded by electrons in shells
  • State the relative charges and relative masses of a proton, a neutron and an electron
  • Define proton number/atomic number as the number of protons in the nucleus of an atom
  • Define mass number/nucleon number as the total number of protons and neutrons in the nucleus of an atom
  • Determine the electronic configuration of elements and their ions with proton numbers 1 to 20, e.g. 2,8,3
  • State that:
    (a) Group VIII noble gases have a full outer shell
    (b) the number of outer shell electrons is equal to the group number in Groups I to VII
    (c) the number of occupied electron shells is equal to the period number