IGCSE Chemistry
2026 - 2028
Syllabus Checklist ✅
Topic 14: The Periodic Table
Arrangement of Elements
Describe the Periodic Table as an arrangement of elements in periods
and groups
and in order of increasing proton (atomic) number
Describe the change from metallic
to non-metallic
character across a period
Describe the relationship between group number
and the charge of ions
formed by elements in that group
Explain similarities in the chemical properties of elements in the same group in terms of their electronic configuration
Explain how the position
of an element in the Periodic Table can be used to predict properties
Identify trends in groups
, given information about the elements
Group I Properties (Alkali Metals)
Describe Li, Na and K as relatively soft metals
with trends down the group: (a) decreasing melting point
(b) increasing density
(c) increasing reactivity
Predict properties of other Group I elements, given information
Group VII Properties (Halogens)
Describe Cl₂, Br₂ and I₂ as diatomic non-metals
with trends down the group: (a) increasing density
(b) decreasing reactivity
State the appearance at r.t.p.: (a) chlorine
– pale yellow-green gas
(b) bromine
– red-brown liquid
(c) iodine
– grey-black solid
Describe and explain displacement reactions
of halogens with other halide ions
Predict properties of other Group VII elements, given information
Transition Elements
Describe transition elements as metals that: (a) have high densities
(b) have high melting points
(c) form coloured compounds
(d) often act as catalysts
as elements and in compounds
Describe transition elements as having ions with variable oxidation numbers
, including iron(II)
and iron(III)
Noble Gases (Group VIII)
Describe the noble gases as unreactive, monatomic gases
and explain this in terms of full outer electron shells
(electronic configuration)
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