Cambridge IGCSE Chemistry
2.2Atomic structure and the Periodic Table
Atomic structure and the Periodic Table in Cambridge IGCSE Chemistry: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic40 practice questions2 lessons
Learning objectives
What the syllabus expects you to be able to do.
- 2.2.1Describe an atom as a central nucleus of protons and neutrons with electrons arranged in shells around it.
- 2.2.2State the relative charge and relative mass of a proton, a neutron and an electron.
- 2.2.3Define proton (atomic) number as the number of protons in the nucleus of an atom.
- 2.2.4Define mass (nucleon) number as the total number of protons and neutrons in the nucleus of an atom.
- 2.2.5Work out the electronic configuration of atoms and ions of the elements with proton numbers 1 to 20 (for example 2,8,3).
- 2.2.6State that the Group VIII noble gases have full outer shells, that the number of outer-shell electrons equals the group number for Groups I to VII, and that the number of occupied shells equals the period number.
Lessons
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Atomic structure
25 min
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Electronic configuration
25 min
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Sample question
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Exam style
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