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2.2 Atomic structure and the Periodic Table

Syllabus
0620–2026–2027
Topic
2.2
Level
—

2.2.1—Structure of the atom as a central

  • Describe structure of the atom as a central nucleus containing neutrons and protons surrounded by electrons in shells

2.2.2—Relative charges and relative masses

  • State the relative charges and relative masses of a proton, a neutron and an electron

2.2.3—Proton number/atomic number as the

  • Define proton number/atomic number as the number of protons in the nucleus of an atom

2.2.4—Mass number/nucleon number as the

  • Define mass number/nucleon number as the total number of protons and neutrons in the nucleus of an atom

2.2.5—Electronic configuration of elements

  • Determine the electronic configuration of elements and their ions with proton number 1 to 20, e.g. 2,8,3

2.2.6—Periodic table shell rules: (a) Group

  • State periodic table shell rules: (a) Group VIII noble gases have full outer shells (b) outer-shell electrons equal group number in Groups I-VII (c) occupied shells equal period number

Objective notes

6 learning objectives
ConceptIGCSE Chemistry